{"product_id":"barnes-noble-glowlight-plus-78-replacement-battery-37v-1500mah-li-polymer","title":"Barnes \u0026 Noble GlowLight Plus 7.8 Replacement Battery PR-285084 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble GlowLight Plus 7.8 \/ BNRV700 — 3.7V Li-Polymer Replacement Battery (PR-285084)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh lithium-polymer battery replaces the OEM cell in the Barnes \u0026amp; Noble GlowLight Plus 7.8 (model BNRV700) e-reader. It fits the PR-285084 slot directly and restores power to the e-ink display, processor, and front-lighting system. Use the capacity figure from the product data — 1500mAh \/ 5.55Wh — as the reference spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlowLight Plus 7.8 and BNRV700 fit:\u003c\/strong\u003e\n    Both model designations refer to the same hardware generation. They share the same battery bay dimensions (84.15 × 49.50 × 2.70mm), the same flex connector, and the same charge IC handshake — one cell covers both.\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 BNRV700 unit. The BMS accepted the new cell without fault flags, the charge IC reached termination cleanly, and voltage under e-ink refresh load held within spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap fuel gauge reset:\u003c\/strong\u003e\n    After installing this battery, run the device down to automatic shutoff, then charge uninterrupted to 100%. The GlowLight's fuel gauge IC is calibrated against the old cell — skipping this cycle causes the percentage meter to read inaccurately from the first hour of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGlowLight Plus 7.8 shutting down at 15–25% remaining\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe e-ink display refresh and front-lighting system draw current simultaneously when page turns happen. On a new cell the fuel gauge IC hasn't mapped the voltage curve yet, so it misreads a brief voltage dip under that combined load as a critically low state. The device triggers a protective shutdown before the cell is actually empty. One full discharge-to-shutoff and uninterrupted recharge cycle gives the fuel gauge enough data to map the real curve and stops the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or dropping faster than expected from 100%\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is fuel gauge drift — the IC on the GlowLight uses coulomb counting referenced to the old cell's internal resistance profile. A new cell has lower internal resistance, so the same current draw reads as a larger state-of-charge drop than it actually is. The fix is a single calibration cycle: discharge fully until the device shuts itself off, then charge to 100% without interruption. After that cycle, percentage readings stabilise at real values.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425838301274,"sku":"BWCS-BNR700SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425838334042,"sku":"BWCS-BNR700SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425838366810,"sku":"BWCS-BNR700SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR700SL-1.webp?v=1779929904","url":"https:\/\/batteryweb.com\/products\/barnes-noble-glowlight-plus-78-replacement-battery-37v-1500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}