Sony MZ-B3 E3 R2 R3 R30 R35 R4 R4ST LIP-12 LIP-12H batteries.

Rechargeable Sony Mini recorder batteries, Replacement Battery power pack for Sony MZ-B3, MZ-E3, MZ-R2, MZ-R3, MZ-R30, MZ-R35 and MZ-R4, MZ-R4ST to replace the LIP-12 and LIP-12H 3.7-volt batteries

It is important to charge your new LIP-12, LIP-12H batteries to fit the Sony MZ-B3, MZ-E3, MZ-R2, MZ-R3, MZ-R30, MZ-R35, MZ-R4, MZ-R4ST Mini Recorder device before first use, also if you do not use the recorder all the time then charge every month to keep the charge up, this will go a long way to extend the life of the new battery.

Replaces Sony 3.7V batteries:
LIP-12, LIP-12H.

Fits the Following Sony Recorders:
Sony MZ-B3, MZ-E3, MZ-R2, MZ-R3, MZ-R30, MZ-R35, MZ-R4, MZ-R4ST.

Battery Type: Li-ion
Battery Voltage: 3.7-volts
Battery Capacity: 2300mAh (Extended battery for longer life)
Compatible with original chargers and OEM equipment.

The Ah is different on my old battery, can I still use yours?
The Ah (Amp Hour) Rating is the storage (or fuel) of the battery, the higher it is the longer the battery lasts between charges, bit like petrol in your car so a higher or lower one makes no different to the performance, just the length of time you can use the battery for between charges.