Yamaha wouldn’t charge while warm

[HikerDave]

It looks like Yamaha uses thermal protection in their battery during the charge cycle. After my commute home yesterday, a hot (45C) day today with a headwind my Yamaha PW-SE battery was down to 25 percent so I brought it in the house and put in on the charger. Uh oh; all four battery level lights blinking. Thinking that the fault was temperature protection in the battery, I removed the battery from the charger and waited; did this every few minutes. After ten to fifteen minutes the battery finally started charging.

 

[Pukmeister]

Yup, thats exactly how the batteries work via thermal management when charging. My Giant has a 6A smart charger that (according to the user manual)switches between the individual cells as they heat up during charging to regulate the charging temperature and avoid overheating.

I havent seen 45C since I stopped living in Western Australia and returned to UK. It's a killer !