About this replacement
Advantech MICA-071 Series — 3.7V Li-Polymer Replacement Battery (13-202-JK5330)
This is a 3.7V, 4100mAh lithium-polymer battery for the Advantech MICA-071 and MICA-071-051 rugged industrial tablets. OEM part number 13-202-JK5330. It fits the slim cell bay directly and uses the same connector and contact layout as the original cell.
- MICA-071 and MICA-071-051 compatibility: Both variants share the same chassis dimensions, connector pinout, and BMS communication protocol — this cell fits either without modification. The 5.20mm cell thickness matches the bay clearance on both builds.
- Bench tested on actual hardware: We cycled this cell on the MICA-071 platform and confirmed the BMS handshake completed on first connection. Charge IC accepted the cell without fault flags, and the fuel gauge began tracking within the first charge cycle.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff once, then charge it uninterrupted to 100%. This forces the fuel gauge IC to re-anchor its calibration against the new cell and clears the percentage display errors that commonly appear after a cell replacement.
MICA-071 shutting down at 15–25% remaining
This happens when the fuel gauge IC is still calibrated to the discharge curve of the old, degraded cell. The new cell has a steeper voltage cliff under combined display and Wi-Fi load than the gauge expects. The tablet interprets a brief voltage dip as a critically low state and triggers an emergency shutdown before the cell is actually empty. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% recalibrates the gauge. After that cycle, shutdowns at artificial percentages should stop.
Fast charging not available after battery swap on the MICA-071
The MICA-071 charge IC runs a handshake with the battery during the first accepted charge cycle before it enables higher charge rates. If you check fast charge status immediately after fitting a new cell, the protocol negotiation may not have completed yet. Connect the tablet to its original charger and let the first full charge run uninterrupted — do not disconnect mid-cycle. Fast charge availability is confirmed once the charge IC logs a completed cycle against the new cell, typically resolved after that single full charge.