Sony PSP GO LIP1412 Replacement Battery 3.7V 850mAh

Sony PSP Go — 3.7V Li-Polymer Replacement Battery (LIP1412)

This is a 3.7V, 850mAh Li-Polymer replacement cell for the Sony PSP Go handheld console. It fits the PSP-N1000 series including PSP-NA1006 and PSP-N100 variants. The LIP1412 slides into the original bay and connects to the same charge IC Sony used across this platform.

• PSP Go platform fit: The PSP-N1000 line runs a single shared battery bay with a fixed connector pinout. All models in this cluster — PSP Go, PSP-NA1006, PSP-N100 — use the same LIP1412 footprint and BMS handshake, so one cell covers the full range without modification.
• Bench tested on actual hardware: We ran this cell in a PSP Go unit and confirmed the charge IC accepted it without rejection flags. The BMS negotiated charge termination cleanly at 4.2V and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• Fuel gauge calibration on first use: After fitting this cell, play through one full session until the console cuts off automatically — do not interrupt with a mid-session charge. The PSP Go's fuel gauge IC sets its empty reference point against that first full discharge, so skipping it causes the battery indicator to read inaccurately for weeks.

PSP Go fuel gauge jumping or freezing after a cell swap

The PSP Go uses a Coulomb-counting fuel gauge that builds its discharge model from cycle history stored in the original cell. Swapping in a new cell resets that history, so the gauge IC starts interpolating against an empty dataset. Until it logs a complete discharge curve, the percentage display can jump, freeze, or drop suddenly from 40% to shutdown. Two to three full discharge-and-charge cycles are enough for the IC to rebuild an accurate model against the new cell's actual capacity.

PSP Go showing low charge capacity in the first few sessions

A new Li-Polymer cell doesn't deliver its rated capacity on cycle one. The electrolyte hasn't fully wetted the electrode surfaces yet, so internal resistance runs high and usable capacity reads low. This isn't a fault with the cell — it's normal electrochemistry on a fresh pack. Capacity climbs progressively across the first three to five cycles until the cell stabilises at or near its 850mAh rating. If capacity still reads significantly short after five full cycles, check that the battery contacts in the bay are seating flush with no debris between the terminal pads.