About this replacement
Nintendo Wii U GamePad — 3.7V Li-ion 2450mAh Replacement Battery (WUP-013)
This 3.7V, 2450mAh lithium-ion cell replaces the original WUP-013 battery inside the Nintendo Wii U GamePad (WUP-010). The GamePad is the primary Wii U controller — it carries the touchscreen, gyroscope, and wireless radio simultaneously, which puts consistent drain on the cell. When the original cell degrades, gameplay sessions cut short or the GamePad refuses to hold charge at all.
- WUP-010 GamePad compatibility: The Wii U GamePad uses a single flat Li-ion cell behind the rear cover. All WUP-010 units share the same battery bay dimensions, connector orientation, and 3.7V nominal rail — so one part number covers the full GamePad lineup.
- Bench tested on actual hardware: We ran this cell in a WUP-010 GamePad with wireless active and the touchscreen at full brightness. The BMS accepted charge cleanly from the GamePad's internal charge IC and reached full voltage without thermal flags or interrupted cycles.
- Fuel gauge reset after swap: After installing this battery, run one complete wireless play session until the GamePad shuts itself off automatically. Do not manually power down. The Wii U's fuel gauge IC sets its empty reference point against the first full discharge cycle — skipping this step causes the indicator to read inaccurately for weeks.
Why the Wii U GamePad loses connection before the battery indicator hits empty
The GamePad's wireless radio and rumble motor share the same power path. Under combined load — active wireless transmission plus rumble feedback — instantaneous current draw spikes sharply. A degraded or partially discharged cell cannot sustain the voltage rail through that spike, so the BMS trips to protect the cell before the fuel gauge registers low. The connection drops, but the GamePad may power back on moments later showing battery remaining. A fresh cell with intact internal resistance handles the spike without a voltage sag that triggers the cutoff.
Wii U GamePad charge light turning off early — cell not reaching full charge
Some GamePads apply a conservative charge ceiling on the first one or two cycles with a new cell. The orange charge indicator goes dark before the cell reaches 4.2V, and the fuel gauge shows less than full. This is the onboard charge IC applying a cautious current limit — it is not a fault with the battery. Run one full discharge and recharge cycle without interrupting either phase. By the second or third cycle, the charge IC settles into its standard CC-CV profile and the cell reaches its rated 2450mAh.