What battery last the longest?

According to Consumer Reports, AAs are the most widely sold non-rechargeable type of battery, and the Energizer Ultimate lithium lasts the longest. It took a total of 1,286 digital photos before running out of power.

When it comes to rechargeables, lithium batteries take the most photos per charge. Pre-charged lithium batteries from major manufacturers provide approximately 300 shots straight out of the box and around 400 following subsequent charges.

Rechargeable lithium batteries are the best choice for high-drain devices, such as cameras. Alkaline batteries are good for low-drain devices, such as remote controls, and the best option for frequently used toys are high-capacity rechargeable batteries.