SmarTab ST7150 Compatible Battery 3.7V 2500mAh GSP3070100

SmarTab ST7150 — 3.7V Li-Polymer Replacement Battery (GSP3070100)

This is a 3.7V, 2500mAh Li-Polymer cell replacing part number GSP3070100 in the SmarTab ST7150 tablet. It powers the display, processor, and wireless radios. Swap it in when the original cell no longer holds a usable charge through a normal session.

• ST7150 fit specifics: The ST7150 uses a flat Li-Polymer pouch cell on a dedicated connector tied directly to the charge IC. The GSP3070100 footprint — 100.50 × 69.80 × 3.20mm — must match exactly or the battery bay won't close and the connector won't seat.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the ST7150 board. The charge IC accepted the new cell without fault codes, BMS handshake completed on first cycle, and the protection circuit tripped correctly at low-voltage threshold.
• Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff — do not force it off — then charge uninterrupted to 100%. This single full cycle lets the fuel gauge IC measure the new cell's actual capacity and clears the miscalibrated percentage readings that appear right after installation.

Why the ST7150 shuts down between 15–25% after a battery swap

The ST7150's fuel gauge IC stores capacity data calibrated to the original cell. When a new cell goes in, the IC's internal model is still mapped to the old, degraded cell — so it calls an early cutoff. The tablet isn't actually empty at 20%; the gauge just thinks it is. One full discharge-to-shutoff followed by an uninterrupted charge to 100% resets the calibration. After that cycle, the reported percentage should track the real cell state accurately.

Fast charging unavailable on the ST7150 after battery replacement

Some ST7150 units won't negotiate fast charge on the first session after a battery swap — the charge IC pauses fast-charge protocol until it completes one accepted standard charge cycle with the new cell. Plug in using the original cable and charger and let the first charge run to 100% without interruption. After that initial cycle, fast charge negotiation resumes normally. If it still doesn't activate, verify the charger output matches the ST7150's rated input — an underpowered adapter will lock the IC to standard charge permanently.