About this replacement
HP eStation Zeen / Photosmart eStation C510 — 3.7V Li-Polymer Replacement Battery (L02442001)
This is a 3.7V, 5000mAh lithium-polymer battery for the HP eStation Zeen tablet and the Photosmart eStation C510. It replaces OEM part number L02442001. Fits model references CQ720A and the eStation Zeen series directly.
- eStation Zeen and C510 platform fit: Both the Zeen tablet and the C510 all-in-one share the same battery bay dimensions and connector pinout. The BMS handshake voltage thresholds are identical across CQ720A variants, so one cell covers the full model range listed.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the eStation Zeen platform. The BMS accepted charge initiation without fault flags, held cutoff at the correct low-voltage threshold, and passed full capacity through the fuel gauge without tripping protection.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff, then charge uninterrupted to 100% before use. The eStation's fuel gauge IC calibrates against the old cell profile — one full cycle resets it to the new cell and eliminates inaccurate percentage readings from the start.
eStation Zeen shutting down at 15–25% remaining
The eStation Zeen drives a backlit display and active WiFi simultaneously, which creates a combined load spike that the fuel gauge IC misreads as a voltage cliff. When the stored cell profile is stale — common after a battery swap — the IC triggers shutdown early rather than accurately tracking remaining charge. This is a calibration issue, not a cell defect. Run one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100%, and the early-shutdown behaviour clears.
Fast charging unavailable on the eStation Zeen after a battery replacement
The eStation Zeen's charge IC negotiates charge rate during the first accepted cycle after a new cell is installed. Until that cycle completes, the system defaults to standard charge rate as a protection measure. This is not a fault with the replacement cell. Charge the tablet fully once without interruption — after that initial accepted cycle, the charge IC re-establishes the correct rate profile for subsequent sessions.