HBU83S Vodafone 716 Replacement Battery 3.7V 800mAh

Vodafone 716 / 715 — 3.7V Li-ion Replacement Battery (HBU83S)

This is a 3.7V, 800mAh Li-ion cell that replaces the OEM HBU83S battery in the Vodafone 716 and 715 smartphones. It fits both models because they share the same battery bay dimensions and connector pinout. Use the capacity figure from this listing — 800mAh — not figures quoted elsewhere.

• 716 and 715 shared platform: Both handsets use the same battery bay at 47.84 × 35.19 × 4.43mm with an identical three-pin connector and the same BMS handshake voltage. One cell covers both models without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the 716 platform. The BMS accepted charge current without fault flags, and voltage under screen-on and call load held above 3.5V throughout the usable range.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging if your carrier or ROM supports it, then run one full discharge down to auto-shutdown followed by a complete charge to 100%. This gives the fuel gauge IC one clean cycle to map the new cell's discharge curve before high-current charging begins.

Sudden shutdown at 20–30% on the Vodafone 716 after a cell swap

A new Li-ion cell has a slightly different voltage-versus-capacity curve than the worn cell it replaces. The fuel gauge IC on the 716 uses the old curve stored in its coulomb counter to predict remaining charge. When actual cell voltage drops below 3.6V under modem transmit load, the phone hits a voltage cliff the gauge did not predict and shuts down — even though the percentage display still read 25% or higher. One full discharge-to-shutdown and recharge cycle resets the counter and eliminates most of these early cutoffs.

Phone won't power on after the replacement battery sat in storage

Li-ion cells self-discharge during storage. If the cell voltage has dropped below approximately 2.5V per cell, the BMS locks out charge current as a protection measure and the phone shows no response — no charge indicator, no boot. Connect the phone to a wall adapter rather than a USB port; wall adapters deliver a trickle pre-charge that most computer USB ports do not. Leave it connected for 20–30 minutes before attempting to power on. If the BMS re-initialises, the charge indicator will appear and normal charging resumes from there.