Juniper Mesa 2 Replacement Battery 3.7V 13600mAh

Juniper Mesa 2 — 3.7V Li-ion Replacement Battery (25260)

This 3.7V 13600mAh (50.32Wh) Li-ion pack replaces the OEM battery in the Juniper Mesa 2 and MS2 handheld data collectors. It fits the same bay, uses the same connector, and communicates with the Mesa 2's battery management circuit. Capacity matches the original spec for full-day field surveying without a mid-session charge.

• Mesa 2 and MS2 compatibility: Both Mesa 2 variants share the same battery bay geometry, contact layout, and BMS handshake protocol. One pack covers both units — no firmware or hardware difference affects fitment or charge communication.
• Bench tested on actual hardware: We ran this pack through charge, discharge, and probe-initialisation cycles on Mesa 2 hardware. The BMS negotiated correctly at power-on, held voltage under sustained GPS and sensor logging load, and did not trip on the current spike when the device's internal peripherals initialised.
• First-use calibration on the Mesa 2: After installing this pack, run a full calibration cycle through the Mesa 2's instrument menu before going into the field. The device maps battery state during that process. Skipping it causes the battery indicator to show premature low-battery warnings during your first measurement session.

Mesa 2 shutting down mid-session despite a charged pack

The Mesa 2 draws a brief current spike each time an internal sensor or peripheral module powers up — GPS acquisition and cellular radio handshakes are the two biggest sources. If the battery's BMS has a conservative overcurrent threshold, this spike trips a protection cutoff before the cell voltage has actually dropped. The device shuts down cleanly, which looks like a flat battery but isn't. This pack's BMS is rated to handle the Mesa 2's initialisation load without tripping under normal operating conditions.

Mesa 2 not recognising the pack after extended storage

Li-ion cells self-discharge over months of storage. If this pack sat in a warehouse or a carry case and dropped below roughly 2.5V per cell, the BMS enters a deep-discharge lockout state — the Mesa 2 shows no charge indicator and may not power on at all. Connect the device to a wall charger, not a USB port, and leave it for at least 30 minutes without interruption. The charger's voltage nudges the BMS out of lockout and allows normal charge current to resume. If the pack does not respond after 45 minutes on the wall charger, try a different cable before concluding the pack is faulty.