{"product_id":"philips-cpj-810-replacement-battery-12v-1800mah-ni-mh","title":"Philips CPJ-810 AR8378BK01 Compatible Battery 12V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips CPJ-810 \/ CPJ-815 \/ CPK-834 Series — 12V Ni-MH Replacement Battery (AR8378BK01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 1800mAh Ni-MH replacement battery for Philips CPJ-810, CPJ-815, CPK-834, CPK-855, and related camera models. It replaces OEM part numbers AR8378BK01, AR8395BK01, V80039BK01, and V80086BK01 among others. Capacity is rated at 21.6Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCPJ and CPK platform compatibility:\u003c\/strong\u003e\n    These Philips camera models share the same 12V battery rail, connector pinout, and BMS handshake protocol. A single cell format covers the full CPJ-810 through CPK-855 range because Philips standardised the battery interface across that generation.\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 camera body, confirming the BMS accepted the replacement without flagging an incompatible cell error. Voltage delivery stayed within tolerance across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge cycle for Ni-MH cells:\u003c\/strong\u003e\n    Ni-MH chemistry in camera bodies benefits from running the initial charge through the OEM charger or camera body itself — not a generic charger. This allows the BMS to map the cell's discharge curve and return an accurate battery-remaining reading during shooting.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCamera showing dead battery indicator on a partially charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003ePhilips CPJ and CPK bodies use a voltage-threshold method to estimate remaining charge. A new Ni-MH cell has a flatter discharge curve than a worn original, so the camera's indicator can misread state-of-charge early on. The BMS maps thresholds against a stored discharge profile, and a fresh cell doesn't match that stored curve until it's been cycled once. Run one full charge-to-discharge cycle through the camera body, then recharge fully. After that cycle, the indicator reading stabilises to within a normal range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFlash not fully recycling between shots on a new Ni-MH cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFlash recycle relies on the battery sustaining current delivery while the capacitor recharges. At the tail end of a discharge cycle, internal resistance in Ni-MH cells rises, and capacitor recharge time increases noticeably. If recycle lag appears earlier than expected, check the cell's resting voltage — it should read above 10.8V under no load to confirm sufficient charge remains. Recharge before the cell drops below that threshold to avoid repeated capacitor recharge lag mid-shoot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333819203674,"sku":"BWCS-VBF2E-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333819236442,"sku":"BWCS-VBF2E-2","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333819269210,"sku":"BWCS-VBF2E-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VBF2E_1.webp?v=1778213259","url":"https:\/\/batteryweb.com\/products\/philips-cpj-810-replacement-battery-12v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}