{"product_id":"ibm-replacement-battery-36v-700mah-ni-mh","title":"IBM-3855 Cordless Phone Replacement Battery 3.6V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIBM IBM-3855 — 3.6V Ni-MH Replacement Battery for Cordless Phone Handsets\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 700mAh Ni-MH replacement battery for IBM cordless phone handsets using part number IBM-3855. It fits the handset unit, not the base station. Swap it when your original pack no longer holds a charge or drops calls due to power loss.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIBM-3855 handset compatibility:\u003c\/strong\u003e\n    IBM cordless handsets on this battery share a 3.6V three-cell Ni-MH configuration with a matched connector footprint. The base station's charging circuit is tuned to this voltage range — swapping to a different chemistry or voltage would break the charge cycle.\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 a cordless phone bench rig. The BMS accepted full charge without cutoff errors, and voltage held stable through RF transmit loads that typically cause sag on degraded packs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    After fitting this battery, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cordless batteries arrive partially discharged from storage — a slow, uninterrupted first charge lets the cells reach rated capacity and sets the baseline for subsequent cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing no charge light on a new Ni-MH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIBM cordless bases use a delta-V detection circuit to confirm charging. A new Ni-MH battery that has self-discharged during storage can arrive below the threshold this circuit expects, causing the base to show no charge activity or an error light. The fix is to place the handset firmly in the cradle and leave it undisturbed — most bases will begin trickle-charging within 15 to 30 minutes once the pack voltage rises slightly. If the light still does not appear after one hour, remove and re-seat the handset to reset the contact connection.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells do not deliver full rated capacity on the first one or two charge cycles — this is normal behaviour, not a fault. The cells need three to five full charge-and-use cycles before the chemistry stabilises and capacity reaches the rated 700mAh. Run the handset down to low-battery indication, then return it to the base for a full charge each time. By cycle four or five, talk time should match or exceed what the original battery delivered when new.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339966087258,"sku":"BWCS-ALD180CL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339966120026,"sku":"BWCS-ALD180CL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339966152794,"sku":"BWCS-ALD180CL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ALD180CL-1.webp?v=1778366982","url":"https:\/\/batteryweb.com\/products\/ibm-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}