Yamaha PW-SE series Original Instructions Manual - page 43

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BATTERY PACK AND CHARGING PROCEDURE

Charging time guidelines

Although charging time varies depending on residual bat-

tery capacity and external temperature, if the battery has 

been exhausted, it generally takes approximately 4 hours 

(Rear carrier type 500 Wh and Down tube type 500 Wh) 

or 3.5 hours (Rear carrier type 400 Wh and Down tube 

type 400 Wh).

If the battery pack enters standby mode while charging, 

charging time will increase by an equal amount.

* If charging after a long period of disuse, the charging 

time will be lengthened depending on the battery status. 

However, note that if the battery capacity indicator lamps 

do not flash in fault pattern (See “Reading the charging 

status”), there is no malfunction.

Charging time*

(Not including standby time)

Charging 

start

Charging 

standby

Charging 

finish

TIP

For example, even if normal charging is started, if the battery temperature or the surrounding tem-

perature is too high or too low, the charging may be extended or charging may be stopped without 

the battery being charged sufficiently in order to protect the battery.