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https://disk.yandex.ru/d/rasFW_s3nMd4Gg - photo of the insides of the brush cutter. FX-Power 20 volt 4 Ah battery: the actual capacity when discharged at 4 A was 4071 mAh. Overcurrent protection. Minimum voltage protection when discharging on each cell - 2.7 V. Maximum voltage protection when charging on each cell - 4.24 V. Charger 1.75 A 21.5 V (plug 6.5 x 3 mm): actual current 1.6 A, max. voltage 21.6 V. Garden brush cutter: FERM FX Power HTM1005. June 07 - 08, 2023