{"product_id":"philips-easyclean-replacement-battery-37v-800mah-li-ion","title":"Philips EasyClean HX6780 Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips EasyClean HX6780 \/ HX6380 — 3.7V Li-ion Replacement Battery (4235 010 13068)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh Li-ion cell replaces the internal battery in the Philips EasyClean electric toothbrush range, covering HX6780, HX6380, and Series 300 models. It fits the same sealed compartment as the original and matches the BMS handshake the toothbrush firmware expects. Install this when the original cell no longer accepts a charge or the brush loses power mid-use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHX6780, HX6380, and Series 300 compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol — which is why one cell covers the full range without modification.\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 the EasyClean platform. The BMS accepted the cell immediately, voltage settled at 4.19V at full charge, and the motor control circuit drew steady current through the full discharge curve without triggering an early cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging habit for this toothbrush:\u003c\/strong\u003e\n    Remove the toothbrush from the inductive charging base once it reaches full charge and only return it when the cell drops below 30%. The base delivers a continuous trickle charge, and leaving the brush seated permanently accelerates capacity fade in the Li-ion cell far faster than partial-charge cycling does.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EasyClean loses brushing power before the indicator shows low\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EasyClean's power indicator reads state of charge from a voltage threshold, not from actual cell capacity. As the Li-ion cell ages, internal resistance rises. Under the brush motor's load, voltage sags below what the motor needs for full oscillation speed — even while the cell still shows sufficient resting voltage to keep the indicator lit. The result is a brush that feels weaker long before the LED signals a low battery. Replacing the cell resets the internal resistance and restores the full voltage delivery the motor expects under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eToothbrush not charging on the inductive base after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EasyClean uses inductive charging, which is sensitive to coil alignment between the base and the handle. If the brush head is not fully seated and clicked down onto the base post, the primary and secondary coils fall out of alignment and charging current drops to near zero. After a battery replacement, the handle reassembly can shift slightly — push the handle firmly onto the base and confirm the charge indicator activates. If it still does not charge, check the new cell's resting voltage with a multimeter; it should read at least 3.0V before the charger will initiate a charge cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426141995098,"sku":"BWCS-PHX930SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426142027866,"sku":"BWCS-PHX930SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426142060634,"sku":"BWCS-PHX930SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PHX930SL-1.webp?v=1779930385","url":"https:\/\/batteryweb.com\/products\/philips-easyclean-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}