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5. Spare parts and components worn in normal use.
6. Failure to register your bike at www.wisperbikes/mywarranty within 14 days of purchase.
It is essential to get your spokes checked and tightened after 300 miles. This is a free
service provided by your supplier. If this service has not been undertaken at the
correct time this may cause damage to the wheels and spokes that will not covered
under our guarantee.
Battery maintenance and user
responsibilities
Your Wisper bike is equipped with a powerful, high quality lithium ion (polymer) battery. Lithium ion
(polymer) is recognised as being the very best type of battery for electric bicycle use.
All lithium ion batteries must be well cared for to optimise useful life and range. It is the responsibility of
the bike owner/operator to ensure the battery is looked after properly. Incorrect use or storage of your
battery may cause damage and void your warranty.
It is not unusual for a well-maintained battery to last for many 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
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.16Ah x 36V = 576Wh. When such a battery loses 30% of its capacity it
will still have 403Wh left, only a little less than a new 24V 18Ah (468Wh) 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.
The key to having a long lasting Li Po 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
If a battery is not cared for as per our instructions it will not reach it’s optimum performance and may not
be covered by our warranty.
Three simple rules
1. Never leave your battery completely discharged
2. Always charge your battery before storage
3. If your battery is left unused for 4 weeks recharge it using the conditioning setting on the charger
For optimum battery performance
1. Never leave your battery completely discharged
2. Always recharge your battery if convenient even after a short journey
3. During long periods of storage and non-use keep your battery about 2/3 full and top up with a
conditioning charge every 6 to 8 weeks.
4. 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
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