{"product_id":"tp-link-neffos-c7a-replacement-battery-38v-2000mah-li-polymer","title":"TP-Link Neffos C7a Compatible Battery NBL-46A2300 3.8V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTP-Link Neffos C7a — 3.8V Li-Polymer Replacement Battery (NBL-46A2300)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2000mAh Li-Polymer cell replacement for the TP-Link Neffos C7a (model TP705A). It matches the OEM part number NBL-46A2300 and fits the original battery bay without modification. Capacity is 7.6Wh, matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNeffos C7a \/ TP705A fit:\u003c\/strong\u003e\n    Both model designations share the same battery bay dimensions (70.72 × 52.88 × 4.36mm), connector pinout, and BMS handshake protocol. One cell covers both variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through a full discharge and charge cycle on the C7a platform. The BMS accepted the charge profile without triggering protection cutoff, and the fuel gauge IC tracked state-of-charge correctly after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle before enabling it again. The fuel gauge IC is calibrated to the original cell's discharge curve. Running one unconstrained cycle first lets it map the new cell before high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Neffos C7a after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the phone's fuel gauge IC still holds the discharge curve of the old, degraded cell. When the new cell's actual terminal voltage drops under modem or display load, the IC misreads remaining capacity and triggers shutdown early. The fix is a full calibration cycle: drain the phone to auto-off, then charge uninterrupted to 100% without using the device. After one complete cycle, the coulomb counter resets its reference points against the new cell and the reported percentage stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating after fitting a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first cycle after installation, the charge IC on the Neffos C7a may not handshake correctly with the new cell's BMS, causing the device to fall back to standard 5V charging. This is normal — the BMS needs one baseline charge cycle before it signals readiness for higher charge rates. Plug into the original TP-Link charger, let it complete a full charge at standard rate, then disconnect and reconnect. Fast charge should re-engage from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392010649690,"sku":"BWCS-TPC710SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392010682458,"sku":"BWCS-TPC710SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392010715226,"sku":"BWCS-TPC710SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TPC710SL-1.webp?v=1779142921","url":"https:\/\/batteryweb.com\/products\/tp-link-neffos-c7a-replacement-battery-38v-2000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}