Replacement Phone Batteries: Model Code and Voltage

Match the battery code, not just the phone name

Phone batteries are model-specific. Manufacturer codes such as EB-BN965ABU or EB-BR730ABE identify the exact cell for a given handset, and two variants of the same phone family can use different ones. Find the code printed on the old battery or the phone's label, then match it to the listing. A cell for the wrong model may have the wrong connector or shape, and one that is slightly off in size can stop the back cover closing.

Reading mAh, watt-hours and voltage

Capacity is shown in mAh, and some listings add watt-hours (Wh), the better like-for-like figure because it includes voltage. For example, 2,600 mAh at 3.7 V is 9.62 Wh, while 2,600 mAh at 7.4 V is 19.24 Wh. Nominal voltage must match the original, typically between 3.7 V and 3.89 V on phones. Lithium-ion and lithium-polymer are the usual chemistries. A cell promising far more mAh than the original in the same case is suspect, because physical size limits capacity.

Questions about Replacement Phone Batteries: Model Code and Voltage

Can I fit a higher-capacity battery than the original?

Only if it matches the model code and voltage and fits the compartment. Cells are limited by physical size, so a battery claiming far more mAh than the original in the same case should be treated with suspicion.

Can I swap the battery myself?

It depends on the phone. Older handsets have a removable back and a battery you slide out; most current smartphones have glued, sealed batteries that need pry tools, heat and careful steps, and the screen or back glass may be damaged.

How do I tell that a phone battery needs replacing?

Common signs include a phone that shuts down with charge left, drains from full within a few hours, or has a back panel pushed out by a swollen cell. A swollen battery is a safety risk: stop charging it and replace it.