About this replacement
Beko 300TR — 3.7V Li-ion Replacement Battery (VPS906R)
This 3.7V, 2600mAh Li-ion battery replaces the OEM VPS906R cell in the Beko 300TR portable payment terminal. It fits the 300TR directly and matches the original voltage, capacity, and connector. Capacity is 2600mAh (9.62Wh) — matching the factory specification.
- 300TR platform fit: The 300TR uses a single-cell 3.7V Li-ion pack with a BMS that validates voltage and connector polarity at boot. This replacement matches those parameters so the terminal completes its PCI startup sequence without rejecting the pack.
- Bench tested on actual hardware: We cycled this cell through charge, idle, and simulated transaction loads — including printer motor pulses. The BMS held without tripping on current spikes typical of receipt printing during busy transaction periods.
- First deployment tip: After fitting the battery, run one complete transaction cycle before using the terminal in a live environment. The 300TR maps available capacity during normal operation and needs at least one full power cycle to display the charge indicator accurately.
Terminal not completing PCI boot sequence after battery swap
The 300TR runs a power integrity check during its PCI boot sequence. A new cell that hasn't completed its first charge-discharge cycle may sit at a resting voltage the terminal's charge IC hasn't yet profiled. This can cause the terminal to stall mid-boot or loop back to the startup screen. Charge the replacement battery fully first, then boot the terminal and let it complete one transaction before deploying it.
Battery indicator stuck at 99% after the first charge completes
On a new Li-ion cell, the charge IC enters a top-off phase once the cell reaches near-full voltage — typically holding at 4.15–4.18V while it trickle-charges the final few percent. The terminal reads this as 99% because the cell hasn't yet delivered a confirmed full-capacity cycle for the fuel gauge to calibrate against. This is not a fault. Run the terminal through one normal discharge-and-recharge cycle and the indicator will settle at the correct level.