Bosch BDU290P Notice D'utilisation D'origine page 198

English – 10​
Charging with Two Battery Packs Inserted
If two battery packs are mounted on one eBike, both
battery packs can be charged using the unsealed con-
nection. To begin with, both batteries are charged
one after the other until they reach approx. 80–90 %
capacity, then they are both charged at the same time
until full (the LEDs on both batteries flash).
When the bike is in operation, power is drawn from
both batteries on an alternating basis.
If you take the battery packs out of the holders, you
can charge each battery pack individually.
Charging with one battery fitted
If only one battery is fitted, you can only charge the
battery that has the accessible charging socket on the
bike. You can only charge the battery with the sealed
charging socket if you take the battery out of the
holder.
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0 275 U07 XPX | (10.01.2019) Bosch eBike Systems