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The Best Motorcycle Battery Chargers

IMG 20190420 150045 - The Best Motorcycle Battery Chargers

It’s a biking rite of passage; you’re ready for your day out on the bike, you’ve got your kit on, said goodbye to your partner, wheeled the bike out of the garage and…. nothing. The bloody battery’s dead. BUGGER!

The vast majority of us never think about our battery until the bike won’t start, by which time it’s too late.

Most bikers also have a car, so in this guide we’ve factored that in. Dedicated motorcycle battery chargers won’t have a high-enough output to work on larger car batteries but then battery chargers that can charge motorcycle as well as car batteries cost more. So we’ve focused on motorcycle-only chargers as our best rated products but we’ve also added a section that focuses on battery chargers that charge cars as well as bikes.

ctek motorcycle battery charger - The Best Motorcycle Battery Chargers
Best Buy

State of the art motorcycle battery charger

The CTEK XS 0.8 is a small fully automatic 6-stage charger that delivers 0.8A and charges 12V batteries from 1.2 to 32Ah and maintenance charging up to 100Ah. It desulphates and maintains a battery and comes with crocodile clips and a weatherproof quick charge harness.

optimate 3 - The Best Motorcycle Battery Chargers
Runner-Up

Latest generation Optimate

Optimate are well established in motorcycling and the Optimiate 3 is their latest 7-stage motorcycle battery charger. It’ll recover, charge and maintain batteries from 2.5 to 50Ah. Supplied with crocodile clips and a waterproof quick-connect lead.

Battery Sulphation

Sulphation has caused many a motorcycle battery to die a premature death but it doesn’t need to be this way – a simple charge every now and then will ensure your battery remains fighting fit and it won’t let you down.

It’s a myth that using your bike on a regular basis means the battery will be in tip-top condition. Even a well-used motorcycle won’t desulphate the battery like a dedicated charger, meaning that even if you regularly use your motorcycle, the battery might decide – just when you need it – that it hasn’t got the strength to go on.

If you’re lucky, a 45-minute charge should coax it back into life but if you’re unlucky, it will have gone past the point of return and even a battery charger with a reconditioning function won’t rescue it.

A good battery charger costs little more than your typical motorcycle battery. Without regular charging, you’ll be lucky to get two years from your battery but with regular charging, you should see five years from your battery. Not bad, eh?

The cheapest motorcycle battery charger

Google is packed with choices when it comes to cheap motorcycle battery chargers. We sifted through the contenders and picked this Motopower 800ma motorcycle battery charger, which retails for just under £20.

It gets good reviews and comes with most of the features of the chargers we’ve picked above. Sure, you can find some chargers around the £10 mark but the majority of these have poor ratings or they are only trickle chargers, meaning they will maintain a healthy battery but not recover or condition it.

Solar powered motorcycle battery chargers

Not everyone has access to a mains power supply but never fear – you can still keep your battery charged by using a solar panel.

Oxford Products make a solar-powered battery charger called the Solariser and they even sell a motorcycle cover that has a built in solar-panel pocket.

If you want a more heavyweight charger with a higher output, you could buy this solar panel use this extension lead and then rig it up to a pre-made connector like this Oxford charger lead. Ideal for your garage or shed.

IMG 20190420 150120 - The Best Motorcycle Battery Chargers

Anatomy of a good motorcycle battery charger

  1. Multi-stage charging: Old school battery chargers gave you two options if you were lucky: 6V or 12V, then some offered fast charge or normal charge but these days you'll benefit from a charger with a bit more brains than brawn. A quality charger will assess the battery's condition before either desulfating it or taking it through a normal charge cycle.

  2. Quick charge harness: As well as crocodile clips, it helps if your charger comes with a quick charging harness (or at least has one you can buy), so you can wire it into your bike's battery, meaning you can connect to the quick-charge connector rather than having to remove your bike's seat (or bodywork) to get to the battery.

  3. Car mode: If you don't have a car, this isn't an issue but if you do, then a charge that can change its amp output is useful. For any motorcycle battery 0.8A is fine and some are 1.2A but for a larger car battery, a 3A (or even 5A) charging ability will come in useful.

  4. AGM mode: Absorbed Glass Matt (or AGM) batteries are different to a normal 'wet' lead-acid battery and benefit from a different charging program. A quality charger like CTEK's MXS 5.0 has an AGM mode.

  5. Reconditioning: This mode is used to recover deep discharged flooded batteries where you could expect a stratified acid (high acid weight in the bottom, low on top). Check with battery manufacturer when in doubt. Use this mode with care, because the high voltage will cause some water loss.

Lithium motorcycle battery chargers

Some modern bikes are supplied with lithium batteries and as the prices of these batteries reduce, they will become more common. Two years ago they were almost twice the price of a regular lead acid battery but now you can expect to pay just 25% more than a regular battery.

The advantage of a lithium-ion battery is that they are much lighter and they also hold on to their charge for longer. However, if you allow a lithium battery to lose voltage they cannot be recovered.

It is not advisable to use a regular battery charger on a lithium battery as even though they will charge the lithium battery there are many risks involved as the charger switches cycles, from causing a fire to rendering the lithium cells useless, so unless you like taking risks or you’re prepared to sit with a voltmeter and check the battery throughout the charging process, you’re better off buying a dedicated lithium-ion motorcycle battery charger.

Our recommendation is the Techmate Optimate Lithium or this Motopower GT2000 which will charge both lithium and regular motorcycle batteries

 

One charger for all your vehicles

ctek mxs 50 car motorcycle charger - The Best Motorcycle Battery Chargers

If like me you’ve got a few cars and bikes, you don’t need more than one charger if you buy the right one. What you will need is multiple quick-charge cables but they’re only a few quid each.

You can choose any brand of charger you want but the one I’ve been using for years and really rate is the CTEK MXS 5.0 charger.

There are loads of reasons that this is a top-notch charger. Firstly, it has individual bike and car modes, so you won’t be over charging a bike battery or taking forever to charge a car battery. It has a max output of 5 amps and a regular motorcycle battery charger is usually 0.8 amps.

It covers gel and lead-acid batteries and has a dedicated AGM mode. It features an automatic 8-stage charging process which tests the battery than starts charging at whatever stage is neccessary from a complete desulphation (high-ampage) to a float mode (trickle charging).

The icing on the cake is that the MXS 5.0 also has a reconditioning mode where it will pulse and cycle an old battery to break down any sulphation and ensure that it is ready to accept a full charge.

All you need to do is grab one of these CTEK quick charge cables for each one of your vehicles and rig it up to the battery. Then you just connect up your charger to each vehicle and let it run through its cycle and when finished, move it over to whichever vehicle might need a boost.

If you have a few old chargers lying around the garage, flog em all on Gumtree and treat yourself to one decent charger and some quick-charge cables and you’re set. Proper job!

Motorcycle battery chargers: Ben's top tips

If you have a car and a motorcycle, then you only need one charger, like CTEK's MXS 5.0 which will charge cars and bikes and recondition batteries too.

Fit quick-charge connectors which can be tucked inside the fairing or stashed under your seat meaning you don't need to get the tools out to remove bodywork when you want to charge your bike's battery.

If you buy a bulk charger without a trickle charge it will kill your battery as it will keep sending current even when the battery nears full, which starts to boil the electrolyte and warp the lead plates.

The competition

Oxford Oximiser 900 – Cheap but effective motorcycle battery charger that charges up to 20Ah batteries.

Battery Tender Junior Wallplug Charger – Neat little wall-plug-based charger from well-known American brand Battery Tender. It’ll charge Lithium batteries too making it a sound investment for your future charging needs.

Optimate 4 CANbus charger – If you have a BMW with CANbus then you’ll know that normal chargers won’t cut it but this CANbus-ready Optimate will do the job.

Motopower 800mA – At under twenty quid, this is a decent charger for the money. Featuring multi-stage charging. For just a few quid more you can upgrade from 0.8A model to the 2A model which will easily cover car batteries too.

Voche 6V & 12V charger – This charger is cheap but it packs a punch. It has a maximum output of 8A which would probably charge the batteries on a warship. If you’ve got a classic bike, it’ll handle the 6v electrics too. 

Battery charger FAQs

Can you charge a lithium motorcycle battery with a normal battery charger?
Lithium batteries are not like lead acid ones and so a regular battery charger. A Li-ion battery cannot accept overcharge and so a regular charger will knacker it. While a regular charger will charge a Lithium ion battery, you are risking destroying the battery if the charger has an equalisation mode which will overcharge the battery and render the cells beyond repair.

How long does it take to charge a motorcycle battery
This depends on many factors; the capacity of the battery, the current state of charge, the output of the charger and the efficiency of the battery (i.e. how sulphated the cells are). Most quality motorcycle battery chargers will need two hours to have charged the battery to a level where it can turn over your bike.

Is there a charger that will charge lithium and normal motorcycle batteries?
Yes, this Motopower charger will charge both.

Sources

Thanks to the following websites which helped us research and write this motorcycle battery guide:

https://earthxbatteries.com/faqs 

https://www.sciencedirect.com/topics/chemistry/lithium-ion-battery