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LiFePO4 batteries handle 100% depth of discharge for thousands of cycles, provided the internal cells remain balanced.▶ 1:28 Nigel Calder explains that regular deep discharge to 10% capacity is safe, but warns that ineffective cell balancing poses a significant risk.▶ 1:28 Many battery management systems (BMS) only perform balancing at the top end of the charge cycle, requiring the battery to reach a full state of charge periodically.▶ 1:05 Without this, individual cells can drift, leading to uneven voltage levels where one cell hits 0% while others remain at 20%.▶ 1:17 This risk increases significantly when connecting multiple drop-in batteries in parallel or series, as most standard BMS units cannot balance across separate battery blocks.▶ 2:41 Improperly managed parallel or series configurations can lead to cell failure. Users should strictly follow manufacturer installation limits regarding the number of batteries in parallel and consider manual balancing procedures for complex setups.▶ 1:49

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