Two common battery types
- Proprietary lithium-ion: many compact cameras use a model-specific battery pack. Match the printed battery model exactly.
- AA or AAA batteries: some older cameras use standard batteries. Use rechargeable NiMH cells for better value and steadier performance.
Why rechargeable NiMH is better for AA / AAA cameras
Old digital cameras can drain disposable alkaline batteries quickly, especially with flash and zoom. Rechargeable NiMH batteries are made for repeated high-drain use, so they usually last better and cost less over time.
How to match a lithium battery
Open the battery door, remove the pack, and read the exact code printed on it. Canon packs may look like NB-4L, NB-5L, or NB-6L. Sony packs may look like NP-BG1, NP-BN1, or NP-BX1. Nikon packs may look like EN-EL series codes. The shape is not enough; the contacts and voltage also need to match.
Before buying a used camera
Ask whether the battery charges, whether the charger is included, and whether the battery door closes properly. If the seller has no charger, search the battery model before buying the camera.
Day-one battery kit
For a lithium-battery camera, buy one working battery, one matching charger, and ideally one spare battery. For an AA / AAA camera, buy rechargeable NiMH cells and a proper charger. Avoid testing old cameras with weak random batteries because low power can look like a camera fault.