Hagenuk E20 Replacement Battery PHBA-309 3.7V 600mAh Novel Hacking and BMS communication protocol —

and BMS communication protocol — so one cell covers the full model range without adapter or modification

If the cell is aged or the replacement is undercharged

and the issue clears on subsequent power cycles

the cradle throws a fault instead of beginning a charge cycle

Performance: Offering consistent voltage under load and predictable recharge behavior

Hagenuk E20 Replacement Battery PHBA-309 3.7V 600mAh Novel Hacking and BMS communication protocol —Hagenuk E20 3. 7V Li ion Replacement Battery (PHBA 309) This is a 3. 7V, 600mAh Li ion replacement battery for the Hagenuk E20 mobile phone. It replaces OEM part PHBA 309 when the original cell no longer holds a charge or has degraded to the point of causing shutdowns. Voltage and capacity match the original spec exactly. Hagenuk E20 fitment: The E20 uses a compact 41. 54 x 41. 54 x 4. 47mm cell with a low 600mAh draw profile suited to the phone's