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Ebike Battery FAQS

Words by The Electric Bike Shop

on 30/09/2021 14:01:00

We often get people asking about battery care – here is a quick summary, if you have any questions our team are happy to help.

What choices of battery are there?

The bigger the battery capacity, the bigger your fuel tank, the further it will take you. We supply bikes with batteries from 400Wh to 725Wh.

What is my battery range?

A host of factors affect the range of a battery on an Ebike. The modes you are using, the terrain, the road surface, air temperature, rider weight, tyre tread & pressure all contribute and affect the assisted range of your bike. If your bike has a range function on the display this will go up and down as you ride but will give you some indication based on the parameters the bike uses to calculate it.

You can view a Bosch guide HERE.

How long does it take to charge my battery?

A full charge can take around 3-4 hours depending on the size of your battery. Faster chargers can speed your charge time up. Most riders will top up their batteries after every trip meaning a charge can take less than an hour.

How often should I charge my battery?

As often as possible is best practice at room temperature, if you are not using your bike and battery for a few days then keep the battery around 60% charge, you may have to top up after a few weeks, don’t let your battery completely drain.

Are batteries affected by air temperature?

Always charge your battery at room temperature. Li-ion batteries don't like being charged or stored at extreme hot or cold temperatures. If you do use your bike in very cold or very warm conditions the range will be less than at normal temperatures. Always remember to let the battery return to room temperature before charging if you have been riding in the cold, this may take an hour or so.

How many charge cycles can I expect from my battery?

A charge cycle is a full discharge and recharge or equivalent. 300-500 is a conservative expectation but if you keep your battery consistently topped up but undercharged, say 70-80% that can double or triple it to 1200-1500. In fact Bosch themselves state that the battery should be good for around 8-9 years or 1000 full charge cycles. After 1000 cycles the battery will still work, but any battery will age over time so it will start to lose capacity and therefore not power your electric bike so far.

Do I need to keep your electric bike battery clean and dry?

E-bikes are designed to be ridden in the rain but never immerse a battery in water (riding through a deep river). If your bike is very wet then contacts on the battery should be dried to avoid oxidation and corrosion. It is good practice to check the contacts every few months and clean if necessary.

How long will my battery last?

Batteries have a shelf life and will degrade over time based on a host of factors but you should comfortably get over 6-7 years 'normal' use and possibly up to 8-9 years. Your overall battery capacity will diminish at a rate dependent on how much it is used and looked after.

Are batteries interchangeable between bikes?

Only if they are like for like on the same Ebike system. Some systems do allow larger or smaller capacity batteries to be interchanged but the style of battery (integrated or external) must be the same.

Should I remove my battery when transporting my bike?

It is advised you always remove the battery from your bike if transporting your bike anywhere for security.

How big is a battery?

Most electric bikes now have integrated batteries which are hidden in the frame, from a distance most people won’t realise you are riding an electric bike! Bosch batteries weigh about 5.5 lbs (2.5 kg) and are among the lightest on the market.

What is the warranty on my battery?

Two years on Bosch and Yamaha systems

Can a battery be recovered if dead?

Possibly. If the battery has gone into a sleep mode it may be recoverable, press and hold down the power button on the battery for 10 seconds and try recharging again.

Can my battery be repaired?

The short answer is no. If you damage your battery, for example by dropping it, it is advised you don't use it. It may look alright but there could be internal damage which could lead to overheating. If you open your battery the warranty is void and opening a battery can be very dangerous so please don’t try and repair at home.

How much does a battery cost to replace?

A typical Ebike battery will cost between £450 & £650 depending on type and capacity. Look after them.

If my battery begins to smoke what should I do?

Isolate it outside as quickly as possible, you can try to damper it with a suitable fire extinguisher if you feel confident in doing so but call 999 if you feel the situation is dangerous.

If you have any other questions about batteries our team are happy to help just give us a call or send us an email.

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