Hence the diverse market for car chargers, solar chargers and auxiliary batteries.
Padacs' latest iPad case, the $59.95 Enduro, contains a "super-slim" (5.5mm) Li-Ion battery pack rated at 6800mAh. This is said to increase the running time of an iPad 2 by 75% and a new iPad by 50%.
The Enduro can also be used to recharge other mobile devices such as smartphones.
The polyurethane case provides clear access to all of the iPad's connectors and controls, and folds to provide multi-angle viewing.
PADACS CEO Raaj Menon said The Enduro "significantly boosts the iPad's battery life without having to carry around charging devices,” said Padacs CEO Raaj Menon. "This is really useful if you fly regularly or forget to charge your iPad overnight."
The Enduro is scheduled to ship in mid-June.