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OptiMate 4 Quad Program 12v Battery Charger / Optimiser

SKU: SI2819

**New** OptiMate 4 Quad Program - This unique 6-step battery optimiser is specially designed for modern 12V starter batteries from 2.5 to 50 Amp-hours capacity. Ideal for motorcycles, ATVs, jet-skis AND MX-5's with either the original Panasonic Gel Battery, or our WestCo Glass Mat Battery!

Since it's launch in 1995, the unique OptiMate has received wide acclaim as an outstanding compact automatic charger, maintainer and recoverer for 12V starter batteries of motorcycles, ride-on mowers and similar seasonal vehicles, as well as for sealed lead-acid gel and deep-cycle batteries used in back-up power supply applications. Now OptiMate 4 Dual Program takes the proven OptiMate interactive charging programme another step further. Unlike the previous Optimate 4, this new version has a user friendly initial battery condition test on connection, to give an instant indication of battery condition prior to charging.

The connectors of the charger output lead as well as the eyelet and clamp leads all feature integral “glide-guides”. These serve 2 purposes – to help weatherproof the cable entries and to hold the connector pins in exactly the right place. This means that there is now no possibility of the pins to becoming mis-aligned, something which was possible in the past and is still the case with competitors’ connectors.

Electronic improvements are wide-ranging. Inside the new housing is a completely new electronic circuit board. The new OptiMate 4 is much more efficient than the OptiMate IIISP which it replaces. It delivers 33% more charging power but consumes less electricity, which also means less heat is generated as a result.

The enhanced electronic functions are now controlled by a microprocessor, which allows additional stages and monitoring controls as well as an expanded and more precise end-of-programme test for power drain. An improved control panel explains the test results and general operation to the user much more intuitively than previously.

Diagnosis of deep-discharge or light sulphation; automatic recovery phase with precisely controlled parameters to recover many neglected batteries, even from as low as 2 Volts.

Multi-stage automatic charging programme monitors and controls both voltage and current while charging the battery to ensure optimum charge for the battery, without any risk of over-charging. OptiMate 4 is totally safe even for long-term connection.

Automatic double-check ensures that the battery is fully charged before switching over to maintenance (float charge) mode. If the check indicates that the monitored signals suggesting full charge were premature, the charger reverts to the main charging stage and continues this procedure until the battery is definitely fully charged.

Hourly checks (in maintenance mode) for any signs that the battery is not able to hold its charge or that it is being drained by something connected to it. If all is well, the green LED indicates after the first of these hourly checks and continues to do so unless something subsequently causes the battery to fail a check. Should this occur the red LED will indicate a "suspect" condition but the charging circuit will continue to support the battery until disconnected.

Automatic cancellation of charging programme when mains power fails. On restoration of mains power the battery is automatically re-assessed and the charging programme appropriate to the battery status is immediately restarted.

Automatic resetting of charging programme in case of accidental loss of contact between charger and battery terminals. If this happens, the circuit will automatically sense the fact and within 7 seconds it will disengage - the charge programme will start afresh on reconnection. OptiMate 4 is totally automatic and fully protected against user errors. There are no switches. Short-circuiting the charger output resets the programme, without sparks or blown fuses. Affordable, compact, intelligent and forgiving of errors, OptiMate 4 is the perfect tool for regular or long-term maintenance of batteries not in daily use.

The REAL & unique 5-step battery optimiser specially designed for all modern 12V starter batteries from 2.5 to 50 Amp-hours capacity.

Diagnoses, recovers, charges, checks & maintains your battery automatically for months. All major battery manufacturers recommend maintaining starter batteries FULLY CHARGED during periods of non-use. OptiMate 4 is totally safe for months-long connection and maintenance of irregularly or seasonally used batteries even while still connected to the vehicle. The sophisticated charging algorithm ensures no risk of over-charging.

Suitable for all types of rechargeable lead-acid batteries: filler cap types; absorbed acid "MF" for motorcycles; valve regulated (VRLA); & GEL-electrolyte types. As simple as 1-2-3: Just connect the OptiMate 4 to your battery, the rest is automatic. Electronically protected against user errors. There is no switch, no fuse and there are no sparks.

Technical Specifications:

Recommended for: AGM, GEL and STD 121V batteries from 4-60Ah and Lithium (LiFePO4) 12.8/13.2V batteries from 2-15Ah
Charging Amps: 1.25A (constant current)
Charging Volts: nominal: 12V & 12.8V range: 0.5V-14.4V
Operation: 4 Charge programs
Steps: 9
OptiMate 4 Quad Program tests before and after charging and can recover a flat lead-acid and lithium (LiFePO4) battery from as low as 0.5 volts.
Use: Indoor / outdoor (lowest temperature -40°c)
Input: Global (100-240V 50-60Hz), high efficiency (CEC listed).
Style: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector.
Save: Low Volt Start of 0.5V + 2-step* desulphation recovery (*1-step low volt pulse save during CAN-bus mode).
Safe: No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected.
Included: O1 weatherproof battery lead, O4 battery clamps and hanging hook.
Warranty: 3-year limited replacement warranty.

We now have available additional charger leads so you can have a permantly wired plug on another vehicle, click here to see!

The ideal battery charger for your MX-5



Based on 10 reviews

Keith Brooks
I had another (branded and not cheap) charger/conditioner connected for weeks and when I checked the battery was flat and the charger had a battery fault LED lit. I bought the Optimate 4 and in 2 days I was able to start the car again. Wonderful service I ordered it on line and it arrived the following day.
01/03/2019 12:16:09
Robert Jones
This is a wonderful addition to my tool kit. It arrived the next day as promised and my battery was on charge in a few minutes. Take your time to read the instructions and the chargers processes as it's all lights and whistles initially. When I monitored it's progress in conjunction with the guide, it demonstrates a complete condition of your battery at every stage. A very useful item.
21/12/2013 12:16:26
Nigel Rowand
I know that this may sound like hyperbole but the Optimate charger may be one of the most satisfying gadgets that I have bought. There is just something about the way it does what it does that just feels right. I love it when a piece of kit does exactly what it is meant to and does so in a satisfying manner - and this charger does that.Don't be fooled by its diminutive size - smaller than most battery chargers I have used - it's a good piece of kit. I had allowed my battery to get far too low over the winter and my existing charger couldn't do anything with it. It was either buy a new battery or try an alternative charger. The charger being the cheaper option I went for that. I'm glad I did.When it arrived, I looked at it with dismay. This small plastic box surely couldn't be the answer to my problem. However, it had a good solid heft to it and, having no other option, I connected it up. The charger went through its initial checks and confirmed that my battery was indeed out of charge and damaged. So, heartened by the fact it seemed to be doing something, I left it overnight. When I came back, the lights had changed. Could it have actually done something? I tried turning the key and my 5 sprang into action on the first try.The battery was still registering as not being perfect so I left the charger connected and over the next few days my battery got better and better. My battery now registers as working perfectly (and experience confirms that it is working). I've left the charger on its maintenance program and my 5 is ready to roll whenever I want it to be.Seriously, I really, really like this charger!
28/07/2012 12:16:33
La prise de branchement est à 3 broches et comporte un fusible. Il faut donc ajouter un adaptateur (pas facile à trouver et environ 25 €) pour se connecter. Pour le reste ça marche très bien, même si le manuel d’utilisation n'est pas des plus clairs pour un néophyte.
06/02/2012 12:16:36
Jo Moore
Woo Hoo no more "all dressed up and nowhere to go" episodes since i purchased the Optimate and the Westco mx5 gel battery.My Mk1 mx5 is her reliable old self and one of the loves of my life again. As everyone knows a spin with the top down lifts the spirits better than the fizziest cocktail. :DMy Mother drove her '71 MGB GT till she was almost 80, at 70 i'm trying to follow in her footsteps with my MX5, with parts and good service from looks like i may manage moore
21/12/2011 12:16:37
Andrew Nicholls
Brillant bit of kit and essential if you do not use your Mx5 for long periods. Much better than the Lidle chargers you get (and I had), as these revitilise the battery, if you disconnected from the car first.
22/08/2011 12:16:40
Brian Haydon
This is a super piece of kit that performs exactly as claimed. Very sophisticated recovery/maintenance process that is perfect for Fives that are not used daily. Connection to battery can be left permanently in position avoiding need to remove battery cover each time it needs charging - connecting block just pokes out from under the cover. TAKE MY ADVICE: buy one of these BEFORE you buy a new battery. I bought a WestCo battery in a hurry to get back on the road, realised I needed a good charger and then put it on the old battery which I hadn't yet thrown away. Result: old battery fully recovered and now I have a spare....
09/08/2011 12:16:40
Alessandro Pettener
Bought this to check teh mx5 battery but also motorbike one. This tool is extremely useful and finally I can keep under control my batteries charge without worrying to leave the charger connected too much long. Good buy!
21/01/2011 12:16:44
Martijn van Tol
Due to the blistering cold (and the fact that we forgot to switch the interior light off....) our westco battery went completely dead. Driving around for an hour did not help but this device works perfect! Clamp it on, leave it for 24 hours and the battery is as new. Recommended!
24/02/2010 12:16:51
Francois Xavier Eon
Delivered ultra quickly to France. Didn't save my panasonic battery but told me that there was a short circuit in it......
08/01/2009 12:17:01

Delivery Information - MX5 Parts

We understand that its really important for you to receive your goods in a timely fashion and for a competitive price. To ensure that we can deliver this we have developed a strategic partnership with both the Royal Mail and our courier partner, Think Worldwide.

At the present time, we only offer one delivery option ‘our carrier’. We will dispatch your goods with the most suitable carrier, for main land UK deliveries this is normally Royal Mail 1st class for packages weighing under 2kg and Think Worldwide for those that are over.

Our delivery charges are based on the weight of the consignment and the destination address. For UK mainland deliveries they start at £2.95 for a package weighing under 200g and rise to a MAXIMUM of £9.95 for a package weighing 2kg or over (EXCEPT very large bulky items that have an additional shipping surcharge added). The exact delivery cost will be clearly displayed at checkout.

Delivery times are estimated at 1-3 working days by Royal Mail, and 1-2 working days by Think Worldwide for mainland UK addresses. If you order before 3pm, Monday to Friday, we will dispatch the same day. If you order after 3pm, we will try to dispatch the same day, but if we cant it will be the next working day. Items ordered after 3pm Friday or over a weekend will be dispatched Monday. Items dispatched on Friday are for delivery the following week. Items ordered over a Bank Holiday will be dispatched the next working day. MX5parts is constantly updated to keep pace with changes in our stock but demand is high and we occasionally run out of popular items. If we have run out of stock and can’t dispatch your order the next working day, we’ll email or phone you with a revised dispatch date. You can then either accept the revised dispatch date or cancel the order, as you wish. Please note, shipping times are an estimate, and can not be guaranteed. Please note that during special offer periods, dispatch of your order may be delayed slightly due to high a volume of orders.

A signature is required for ALL orders delivered by Think Worldwide. Someone must be at your delivery address to sign for your parcel between 8am and 6pm on a working day. Please send it somewhere it can be reliably signed for, like your place of work, a neighbour, or perhaps your grans. We can (but we don’t like to) ask the courier to leave your parcel without a signature. If we do this, it will be YOUR responsibility if the parcel is lost or damaged. If you want it left, you need to give us your express instructions in the ‘additional information’ box at the end of the checkout process. It would be helpful if you could also indicate exactly where the package should be left.

If you need to change your delivery address, for any packages that have been dispatched with Think Worldwide, there will be an additional charge of £9.95 if the package has already been dispatched.

Please remember, even with Royal Mail deliveries, that any items which are too large to fit through your letter box will need someone to be available to receive the delivery. If the item cannot be delivered, you will be carded and given the option of either a re-delivery or you can collect your parcel from your local post office depot.

Orders sent to countries outside the UK will be sent VAT free, however please note that on all international shipments, the recipient is responsible for any local VAT, import duty and other clearance fees that may be charged.

For further information please email:

We NOW deliver to the following countries:

Baleares, Spain
British Virgin Islands
Burkina Faso
Canary Islands
Cayman Islands
Channel Islands
Costa Rica
Czech Republic
Dominican Republic
El Salvador
France (Mainland Only)
French Guiana
Hong Kong
Marshall Islands
New Caledonia
New Zealand
Papua New Guinea
Portugal (Mainland Only)
Puerto Rico
Saint Vincent And The Grenadines
San Marino
Saudi Arabia
South Africa
Spain (Mainland Only)
Sri Lanka
St Lucia
Syrian Arab Republic
Taiwan, Province of China
Trinidad And Tobago
United Arab Emirates
United Kingdom
United States

Our Guarantee - MX5 Parts

We guarantee that you’ll be satisfied with mx5parts!

We are an independant, family company, run by a dedicated team. We aim to be the kind of company that we’d like to deal with if we were you. You have our absolute commitment as fellow MX-5 owners, car nuts, internet users and hard-working people that you’ll be satisfied with mx5parts. If you’re not, let us know and we’ll sort it out!

We guarantee “always fair prices”

MX5parts maintains an everyday savings pricing policy. We watch other retailers closely and maintain competitive pricing. The internet being the beast it is means that any Tom, Dick or Henrietta can set up a website in their back room and charge bargain basement/off the back of a lorry (guv) prices. Often they will have no stock, no returns policy, questionable security, no guarantees and of course poor customer service. MX5parts strives to be open and honest, so we will never inflate our prices to set up an artificial ‘sale’ (a common – and illegal – retail practice).

It is inevitable in an open market like the internet that there will be some individuals selling some items cheaper than we do, and some selling them for more than we do, just as in the high street. We take great pride in offering a fast, efficient, friendly and secure shopping experience, with great products at fair prices. We encourage our customers to shop around, but are very pleased to welcome them back again and again.

We guarantee to despatch your order when we say we will

If you order before 3pm, Monday to Friday and we have your items in stock , we’ll despatch the same day . If you order after 3pm, we’ll still try to despatch that day but, if we can’t, we’ll despatch the following day. Items ordered after 3pm Friday or over a weekend will be despatched Monday. Items despatched on Friday are for delivery the following week. Items ordered over a Bank Holiday will be despatched the next working day. MX5parts is constantly updated to keep pace with changes in our stock but demand is high and we occasionally run out of popular items. If we have run out of stock and can’t despatch your order the next working day, we’ll email or phone you with a revised despatch date. You can then either accept the revised dispatch date or cancel the order, as you wish. Please note that during special offer periods, dispatch of your order may be delayed slightly due to high a volume of orders.

We guarantee to replace any goods which aren’t suitable

We guarantee to accept back any goods that you do not want, are not suitable, have changed your mind about, infact, for ANY reason, provided the goods reach us within 30 days of dispatch from us, in their original condition and packaging. Please tell us why you are returning the items, just for our records. The original purchase price of the goods will be refunded on to the card that was used for their purchase. Sorry, but we can not refund the carriage costs.

We guarantee to sort out any problem with your order

Just contact us if you have any problems with an order from mx5parts. We’ll tell you exactly what steps we’re going to take to rectify the problem.

We guarantee full warranty support on all items

Just contact us if you have a warranty problem. All goods supplied by mx5parts are from official sources and are covered by the normal manufacturers warranty.

We guarantee that we will only charge your credit/switch card when your goods are dispatched

This is your right under UK law and, if we do anything else, it’s illegal!

(Please note: This doesn’t apply however if you have chosen to pay via PayPal. Due to the way PayPal works, you are effectively sending the money to us rather than us asking for it so in this instance we will have received payment at the time the order was placed and not when it is ready for dispatch).

We guarantee that we won’t pass your email details on to anyone else

Absolutely not. All your details are treated as strictly confidential. We’re internet users, too, and we know how annoying unsolicited email can be. We wouldn’t risk annoying you by being the cause of it.

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