Part 1 of 4
Do not leave your battery exposed to direct sunlight.
Part 2 of 4
Store your battery in a dry, ventilated place with a temperature between 0°C and 20°C. The ideal charge level for your battery during prolonged storage is 40% in order to limit the self-discharge phenomenon of the battery.
Part 3 of 4
Remember to recharge your battery regularly, even if you're not using it (at least once a month). This will prevent the deep discharge phenomenon.
Part 4 of 4
When charging your battery, first connect your charger to the battery connector located under the saddle before plugging into the mains socket. This will limit the risk of arcing.