Sudden electrical fault

[Anbro]

Hi all. In August 2016 I bought an elife folding bike from ideal world shopping channel. I've have ridden the bike most days since then. When riding and powered on. Most of the time the four Leds indicating the battery level with show four Leds with a full battery and one blinking led for a battery which needs a full charge.

Yesterday the bike developed an electrical fault. With 3 Leds showing having an almost full battery the power suddenly turns itself completely off without any prior warning. I now find. The key on the battery has to be turned to the off and then on postion before powering on the bike with the standby button on the control led panel.

Normally when the bike is working OK. I would switch on the power at the battery and then power up by touching the standby button on the control led panel . But now the thing won't power back on until change the key position on the battery off and on. Once the fault happens the first time. I reset the power and the bike will turn itself off and will not come back on until I give it a full charge.

After charging over night. today it happened again for a second time.


Anyone have here have any advice or trouble shooting tips.


Thanks in advance

Andrew.

 

[Nealh]

Hard to say with out opening the battery but suspect its wire fault with the key switch or even a faulty switch, other wise an associated loose poor wire/connection issue.
Less then a year speak to Ideal world first as must have a years warranty and may just swap out the battery.

 

[Deleted member 4366]

If the LED display goes off, then the power from the battery to the motor controller has been interrupted. Probably the two most common reasons are that the key switch wasn't soldered properly or one or more of the cells in the battery is faulty. Another common cause is bad battery contacts.

The key-switch soldering can cut out randomly, but normally when under high load.
The bad cells would almost certainly switch off under high load, like hill-climbing.
Bad battery contacts would normally cut after a bump.

You can test for a bad cell by charging the battery. as soon as you get the green light on the charger, disconnect the charger and measure the voltage on the battery terminals. less than 41.5v (or 28.9v for 24v battery) is dodgy. The lower it is beyond that, the more likely your battery is knackered.