{"product_id":"tp-link-neffos-c5-plus-replacement-battery-38v-2050mah-li-ion","title":"TP-Link Neffos C5 Plus Replacement Battery NBL-40A2150 3.8V 2050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTP-Link Neffos C5 Plus — 3.8V Li-ion Replacement Battery (NBL-40A2150)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 2050mAh Li-ion battery replaces the original cell in the TP-Link Neffos C5 Plus smartphone, including variants TP7031A and TP7031C. It matches OEM part numbers NBL-40A2150 and NBL-40B2150. Install it when your original cell no longer holds a charge or shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTP7031A and TP7031C variant fit:\u003c\/strong\u003e\n    Both handset variants share the same battery bay dimensions, connector pinout, and BMS communication protocol — this cell fits either without modification or adapter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a C5 Plus unit. The BMS accepted charge current correctly, voltage held steady through screen-on load, and the protection circuit tripped at the expected cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins on an uncalibrated cell.\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 C5 Plus after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff problem, not a defective cell. A new Li-ion cell has a slightly different discharge curve than the aged original. The fuel gauge IC — still calibrated to the old cell — misreads state of charge and allows the phone to keep running until actual cell voltage drops below the modem and display's minimum operating threshold. The phone cuts out even though the reported percentage looks safe. One full uninterrupted discharge-charge cycle recalibrates the coulomb counter and eliminates the false floor.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting incorrect battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C5 Plus uses a fuel gauge IC that builds its charge model against the cell it was last calibrated on. Swap the cell and that model is immediately wrong — percentages can jump, stall, or read high while actual capacity is lower. This is not a firmware fault or a defective replacement. Discharge the phone until it powers off automatically, then charge uninterrupted to 100% without removing the cable. After one full cycle, the IC re-anchors its curve to the new cell and percentage readings stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391983353946,"sku":"BWCS-TPC530SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391983386714,"sku":"BWCS-TPC530SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391983419482,"sku":"BWCS-TPC530SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TPC530SL-1.webp?v=1779142738","url":"https:\/\/batteryweb.com\/products\/tp-link-neffos-c5-plus-replacement-battery-38v-2050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}