Gepida reptila 900

[Sniper45]

Hi I have bought a reptila 900 on eBay the battery has gone to sleep it's not being recognised by the charger is it possible to restart it if not could I replace it with a 36 volt battery with more power the bike is a 2010 model with a 26 V Yamaha motor

 

[Nealh]

Try long pressing the battery switch for approx. 10 -30 seconds to see if it wakes up.
Also if the charger doesn't recognise the battery it is because the battery internal BMS won't allow it to charge because of cell voltage imbalance, this means one or more cells groups have discharged below the lvc (low voltage cut off) and simply won't allow the charger to work.
The battery will need manually balancing and need opening up to do so.

 

[flecc]

could I replace it with a 36 volt battery with more power the bike is a 2010 model with a 26 V Yamaha motor

Almost certainly not. This interim Yamaha crank unit was a near copy of the Panasonic one. If the internal circuit board is on the same computer style CPU-based lines which it most likely is, you're stuck with the 26 volts.

However, if it has a shunt like the 26 volt Panasonic units, more power may be possible with 26 volts. On my Performance Enhancement web page, scroll down to 26 volt New Units to see that detail. Any mods at your own risk of course.
.

 

[Sniper45]

Try long pressing the battery switch for approx. 10 -30 seconds to see if it wakes up.
Also if the charger doesn't recognise the battery it is because the battery internal BMS won't allow it to charge because of cell voltage imbalance, this means one or more cells groups have discharged below the lvc (low voltage cut off) and simply won't allow the charger to work.
The battery will need manually balancing and need opening up to do so.

When you say to long press it for 10 to 30 seconds do you mean with it plugged into the charger

 

[flecc]

When you say to long press it for 10 to 30 seconds do you mean with it plugged into the charger

No, just with the battery alone, keep the button pressed.

That might wake it up, and on a few types that will also display the potential capacity of the battery.
.

 

[Zlatan]

No, just with the battery alone, keep the button pressed.

That might wake it up, and on a few types that will also display the potential capacity of the battery.
.

We have one of those bikes but with Bosch system. We had similar issues and had to purchase a new battery.. Been fine since... Its a nice bike for an road,where it is quicker than my Haibike. (which is currently in dry dock, I, m rebuilding motor, crank bearings went. Dealer doesnt offer rebuild service or even parts. They want you to buy a new motor (£1000) for a bike the essentially needs new bottom bracket bearings. Got Al bits on order from performance line bearings

 

[Nealh]

If it's a bosh or yamaha battery then no shop/dealer will repair it and in their eyes it is scrap for recycling, your only option will be a diy attempt to see if it can be salvaged.
Georgehenry's yamaha battery's discharge port broke and the dealer said it was unrepairable and scrap and he would have to buy a new one, cost £800.
Fortunately he and a pal repaired it for a few pounds.