The high-quality, durable eBike batteries from Bosch offer a high energy density in a compact size and lightweight design. The PowerPack 545 is your ideal companion for outings and city trips. It provides ample energy, even for spontaneous detours or more elevation gain than planned. Charging is very simple: the PowerPacks can be easily removed for charging with a Bosch Charger or conveniently charged while on the bike. Fully charged in 4.9 hours, and half charged in 1.8 hours (with a 4 Amp charger).