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4.1.3
It is not unusual for a well-maintained battery to last for several years. Though your bike will
feel less powerful as the battery gets older, and the range will diminish, you can continue using the
battery for many years to come.
A key point to remember when choosing a battery is to check the battery capacity (V x Ah = Wh the
battery’s capacity) i.e.17Ah x 36V = 592Wh. When such a battery loses 30% of its capacity, it will still
have nearly 400Wh left, only a little less than a new 24V 18Ah (432Wh) or a 36V 12Ah (432Wh)
battery. Choosing a larger battery not only gives you more power and range, but is often more
economical in the long term.
4.1.4
The key to having a long lasting battery is to look after it. This means never leaving your
battery fully discharged and always conditioning the battery when not in use i.e. in the winter.
4.1.5
If a battery is not cared for as per our instructions, it will not reach its optimum performance
and may not be covered by our warranty.
Six rules for optimum battery performance
1. Never leave your battery completely discharged for more than 24 hours
2. Always charge your battery before storage
3. If your battery is left unused for four weeks or longer, recharge it using the 39V conditioning
charge on your charger. Only use the charger supplied with your battery or a correct model
replacement from Wisper.
5. When in storage, keep your battery in a dry room.
6. For optimum power, range and longevity, keep your battery in a warm room above 15 degrees
centigrade.
We reserve the right to check batteries claimed under warranty to ensure they have been
maintained as per our instructions.
