{"product_id":"custom-battery-pack-replacement-battery-36v-300mah-ni-mh","title":"1\/3AA\/300X3 Replacement Battery Pack 3.6V 300mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1\/3AA\/300X3 — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 300mAh Ni-MH replacement battery pack built around three 1\/3AA cells wired in series. It replaces OEM part number 1\/3AA\/300X3 in compact electronic devices that originally shipped with this configuration. Typical applications include emergency lighting units, cordless phones, and small portable electronics running on this exact cell format.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThree-cell series stack:\u003c\/strong\u003e\n    Three 1\/3AA cells in series produce the 3.6V rail this device class requires. Any deviation — a mismatched cell, a weak link — shifts the pack voltage outside the charge IC's acceptance window. Every cell in this pack is matched to within 10mV open-circuit before assembly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the bench. The BMS accepted charge current normally, cell balance held across all three positions, and terminal voltage at end-of-charge measured within spec of the 3.6V nominal rating.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on fuel-gauged devices:\u003c\/strong\u003e\n    If your device has a capacity indicator, run one complete charge-discharge cycle after installation. Fuel gauge ICs track coulombs against a stored baseline — a new cell swap resets that relationship. One full cycle re-anchors the gauge to the actual cell capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage, typically 3.2–3.4V across three cells, not the rated 3.6V. Some devices perform a voltage range check on power-up and will report low battery or refuse to operate if the pack reads below their acceptance threshold. This is not a fault with the pack — it is a storage state. Charge the pack fully before first use; terminal voltage will rise to 3.6V and the device should accept it on the next power-on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, some charge ICs apply a reduced current to new or long-stored Ni-MH cells, which can make the pack appear to terminate early or report partial capacity. This is a normal conditioning behaviour — the charge controller is reading dV\/dT (voltage slope) cautiously on unfamiliar cells. Complete the first charge uninterrupted and follow immediately with a full discharge. The second charge cycle will deliver full capacity as the controller adjusts its termination threshold to the actual cell response.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333498110042,"sku":"BWCS-CM011SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333498142810,"sku":"BWCS-CM011SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333498175578,"sku":"BWCS-CM011SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM011SL-1.webp?v=1778212802","url":"https:\/\/batteryweb.com\/products\/custom-battery-pack-replacement-battery-36v-300mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}