Using the Shimano Steps BT - E6010 battery is easy. First, make sure it's properly mounted on the down tube of your bike as it's designed for. When it's time to charge, plug it in using the appropriate charger. The charging process takes about 4 hours, so you can leave it overnight or during the day when you're not using the bike. When it comes to temperature, don't try to charge it if it's colder than 0°C or hotter than 40°C. And for normal operation, keep it within -10°C to +50°C. As for maintenance, try to avoid over - charging and deep - discharging the battery. After about 1000 full - charge cycles, you might notice a decrease in capacity, but it should still have a good amount of power left. If you want to store the battery for a long time, make sure it's charged to around 50% and keep it in a cool, dry place.