Always use the TPS 7 charger supplied with the device (or purchased separately) to charge TPS 7 batteries. Using an unsuitable charger can cause irreparable damage to the battery and fire.
Do not charge the battery immediately after bringing it from cold to warm. Wait at least 30 minutes for the battery to warm up.
Do not leave the battery unattended while charging.
Do not use the charger if it has been modified or damaged.
Do not leave the battery in a charger connected to the mains after charging is complete.
Do not expose the battery to high temperatures or naked flames.
Do not use the battery as a power source for devices that do not support TPS 7 batteries.