{"product_id":"square-led-light-replacement-battery-74v-5200mah-li-ion","title":"Square LED Light 7.4V 5200mAh Compatible Battery MP NCM 2s2p","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSquare LED Light — 7.4V Li-ion Replacement Battery (MP NCM 2s2p)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V 5200mAh Li-ion replacement battery for the Square LED light. It uses a 2s2p cell configuration — two cells in series for voltage, two in parallel for capacity. Capacity is sourced from product data: 5200mAh \/ 38.48Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2s2p cell configuration:\u003c\/strong\u003e\n    Two cells in series deliver the 7.4V nominal voltage the LED driver needs to maintain consistent output. Two cells in parallel double the capacity. Both strings must stay balanced — the BMS monitors individual cell voltages and will cut output if either string drifts more than roughly 100mV from the other.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on the bench. The BMS engaged correctly at low-voltage cutoff, and the protection circuit held under the high-current draw of the turbo drive stage without tripping prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMulti-cell replacement rule:\u003c\/strong\u003e\n    In a 2s2p pack, mixing a new battery with an aged original creates an instant cell imbalance. The older cells carry unequal load under high-current draw, accelerating degradation. Always swap the full pack — never pair this battery with a partially used original.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Square LED light dims before the battery indicator drops\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe LED driver in this light uses brownout protection to step down output before the BMS hard-cuts the pack. At high draw, cell voltage sags below the driver's minimum input threshold — even though the resting voltage still reads normal. The driver interprets this as low-cell and steps down to protect itself, not the battery. This is expected behaviour, not a fault in the replacement pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining noticeably faster in turbo mode\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eTurbo mode drives the LED at maximum current — typically five to ten times the draw of standard output. At that current level, the 2s2p pack delivers full rated capacity only at lower C-rates. Under sustained turbo draw, internal resistance causes voltage sag, and the driver steps down output sooner. Switch to mid-output for extended use. If the pack cuts off early, check resting voltage after a full charge — it should read at or above 8.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377513693274,"sku":"BWCS-FLH660FT-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377513726042,"sku":"BWCS-FLH660FT-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377513758810,"sku":"BWCS-FLH660FT-3","price":50.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FLH660FT-1.webp?v=1778767205","url":"https:\/\/batteryweb.com\/products\/square-led-light-replacement-battery-74v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}