Qaphela ukukhutshwa kwebhetri ye-lithium kunye nokutshaja phantsi kobushushu obuphantsi. Xa ubushushu obuphakathi buphantsi kakhulu, imodyuli yokufudumeza iya kufudumeza ibhetri ye-lithium ide ifikelele kubushushu obusebenzayo bebhetri. Ngeli xesha, ii-bms ziyavuleka kwaye ibhetri iyatshaja kwaye ikhutshwe ngokwesiqhelo.