HandHeld Dolphin 6500EP PR-042025 Replacement Battery 3.7V

HandHeld Dolphin 6500EP — 3.7V Li-Polymer Replacement Battery (PR-042025)

This is a 3.7V, 140mAh Li-Polymer replacement battery for the HandHeld Dolphin 6500EP mobile computer. It fits the Dolphin 6500EP rugged barcode scanner used in retail, warehousing, and logistics workflows. Part number PR-042025 matches the OEM cell geometry and connector exactly.

• Dolphin 6500EP platform fit: The 6500EP uses a compact Li-Polymer cell with specific pin-out and BMS handshake requirements. This pack meets that handshake so the device recognises the battery and enables the scan trigger without throwing a low-battery lockout on startup.
• Bench tested on actual hardware: We cycled this pack through simulated scan burst sequences and monitored BMS response. The protection circuit held stable across both laser activation inrush and wireless radio polling events without false cutoffs.
• First-shift preparation on the Dolphin 6500EP: After installing this pack, seat the scanner in its charging cradle for a full charge cycle before field use. The scan trigger draws its highest inrush current when the cell is near minimum charge — a pre-charged pack prevents false BMS trips on the first pick-and-pack shift.

Cradle showing a charging error on a freshly installed pack

A charging error on the dock immediately after swapping batteries usually comes down to contact resistance between the pack and the cradle's charging pins, not a fault in the battery itself. Dust, residue from worn packs, or slight misalignment stops the dock from reading a valid connection. Wipe the battery contacts and cradle pins with a dry lint-free cloth and firmly reseat the scanner. If the error clears, the pack was seated correctly and charging proceeds from 3.7V nominal.

Scanner losing wireless connection during rapid scan bursts

During fast barcode scan sequences, the Dolphin 6500EP draws simultaneously from the imager and the wireless radio. On a degraded or partially charged battery, this combined inrush can pull cell voltage below the BMS hold threshold, briefly cutting radio power and dropping the wireless session. The scanner appears to freeze or disconnect mid-task. Ensure the pack is fully charged before a high-volume shift — a rested cell at full charge holds the voltage rail above the BMS floor even under combined load.