About this replacement
VeriFone e315 / e335 Series — 3.7V Li-Polymer Replacement Battery (BPK087-300)
This 3.7V, 1300mAh Li-Polymer battery replaces the original pack in VeriFone e315, e315M, e335, and e335M payment terminals. It matches the OEM dimensions of 64.00 × 41.80 × 4.40mm and uses the same BMS handshake protocol expected by the terminal's charge controller. Swap it in when the original cell no longer holds a charge or the terminal shuts down unexpectedly during transactions.
- e315 and e335 shared battery platform: Both the standard and M-variant terminals use the same battery bay, connector pinout, and BMS communication protocol — that is why one part number covers all four models. The charge IC on each reads cell voltage and temperature data from the same register addresses.
- Bench tested on actual hardware: We cycled this cell through the VeriFone boot sequence, NFC tap events, and receipt print cycles on the bench. The BMS accepted the handshake without fault codes, and the charge controller entered constant-current phase as expected on both the e315 and e335 test units.
- First deployment tip for POS terminals: After fitting the battery, complete one full transaction cycle before putting the terminal into live service. The terminal maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the on-screen charge indicator correctly.
Terminal not completing PCI boot sequence after battery replacement
The VeriFone e315 runs a PCI-compliant security check on every cold boot. If the battery voltage is below approximately 3.5V when the terminal powers on, the processor may not sustain the boot sequence long enough to pass the security handshake. A new cell shipped in storage state can sit at 3.3–3.4V. Connect the terminal to the charging cradle or USB-C power source before the first boot and let it charge for at least 15 minutes before powering on — this brings the cell above the minimum operating threshold the firmware requires.
Charge indicator stuck at 99% during initial charge
On a fresh cell, the e315's charge IC enters a top-off mode once the cell reaches roughly 4.15V — it trickle-charges at low current rather than switching to the final 4.20V termination voltage immediately. The display holds at 99% during this phase, which can last 20–40 minutes depending on ambient temperature. This is normal charge IC behaviour, not a fault. Leave the terminal on charge until the indicator advances to 100% and the charging LED changes state.