TP-Link Neffos A5 NBL-45A3000 Replacement Battery 3.7V 2600mAh

TP-Link Neffos A5 / TP7032A — 3.7V Li-ion Replacement Battery (NBL-45A3000)

This is a 3.7V, 2600mAh (9.62Wh) Li-ion battery built to fit the TP-Link Neffos A5 and TP7032A smartphones. It replaces OEM part number NBL-45A3000 directly. If your original cell no longer holds a charge or the phone shuts down unexpectedly, this swap restores normal operation.

• Neffos A5 and TP7032A compatibility: Both model numbers share the same physical footprint, connector pinout, and BMS communication protocol — the TP7032A is the internal hardware designation for the Neffos A5 retail unit. One battery covers both references.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Neffos A5 unit. The BMS accepted the cell without error flags, thermal cutoff engaged correctly at upper voltage limits, and the charge IC completed a full cycle without interruption.
• Fuel gauge recalibration on first use: After installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC on the Neffos A5 is calibrated to the old cell's discharge curve — running one slow cycle first lets it reset its coulomb counter against the new cell before high-current charging begins.

Sudden shutdown at 20–30% on the Neffos A5 after a cell swap

This is a voltage cliff issue, not a defective battery. When the modem fires during a call or the screen brightness spikes, the new cell experiences a brief high-current draw. If the fuel gauge IC hasn't recalibrated yet, it misreads the remaining capacity and the phone's protection circuit trips the shutdown. The fix is one full discharge-charge cycle with fast charging off — let the phone drain to auto-shutdown, then charge slowly to 100%. After that cycle, the coulomb counter tracks the new cell's actual voltage curve and the premature cutoffs stop.

Neffos A5 showing wrong battery percentage after replacement

The fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, the IC is still referencing the old data — so it may report 15% when the cell is actually at 35%, or jump from 40% to 10% with no warning. This isn't a fault in the replacement cell; it's the gauge recalibrating. Drain the phone completely until it shuts off on its own, then charge uninterrupted to 100% at standard charge rate. One full cycle is usually enough to re-anchor the IC to the new cell's actual 3.7V nominal curve.