Restore a 40v Li battery that holds charge but won't recharge

I have a 40v, 2 AH, Type 4 Black and Decker lithium battery for a trimmer that is capable of holding a charge but when placed in a charger produces a flashing error signal. I have another of the same battery that charges ok, so the problem isn’t the charger. Also, the flaky battery will run

Recovering Lithium-Ion Batteries : 8 Steps - Instructables

Ryobi 40V BMS troubleshooting and repair, Page 9

BLACK+DECKER 40-V 2 Amp-Hour; Lithium-ion Battery in the Power Tool Batteries & Chargers department at

Charging Lithium-Ion Batteries – Battery University

BLACK+DECKER battery is compatible with multiple 36V and 40V MAX* outdoor tools for versatile charging Lightweight design lets you work in comfort

BULL-TECH 40 Volt MAX 2.0Ah Lithium Black and Decker 40V Battery,Compatible with All Power 40V Black and Decker Power+ Tools

Kobalt 5 Ah Lithium Ion (li-ion) at

RYOBI 40-Volt Lithium-Ion 6.0 Ah High Capacity Battery (3-Pack) OP4060-3B - The Home Depot

RYOBI 40V Lithium-Ion Rapid Charger OP406A - The Home Depot

🔋【Package Include】1Pack x 3500mAh Replacement Black+Decker 40V lithium battery, 1Pack x Replacement LCS40 40 Volt MAX black decker charger. 🔋【Widely

40V Energup 3.5Ah Replacement Black and Decker 40Volt Lithium Battery LBX2040 LBXR36 LBXR2036 LST540 LBX1540 LST136W with a LCS40 LCS36 Fast Charger

Restore a 40v Li battery that holds charge but won't recharge?

【Dual Battery Charger】: 2-ports charging station available, charging 2 40V batteries at the same time, meets more of your charging needs. 【OP401 40V

KUNLUN OP401 40V Dual Battery Charger for Ryobi 40 Volt Lithium ion Charger OP4040 OP4026 OP4026A OP4050A OP40601 OP40602 OP4030 OP4015 OP40201 Li-ion

RYOBI 40V Lithium-Ion 6.0 Ah High Capacity Battery (2-Pack) OP4060-2B - The Home Depot

Hart 40 volt battery BMS reset question : r/batteries

Restore a 40v Li battery that holds charge but won't recharge?

Restore a 40v Li battery that holds charge but won't recharge?