{"product_id":"universum-cl15-replacement-battery-24v-650mah-ni-mh","title":"Universum CL15 Replacement Battery 2.4V 650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUniversum CL15 \/ SL15 — 2.4V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 650mAh Ni-MH battery pack for Universum CL15 and SL15 cordless phone handsets. It replaces the original cell when talk time or standby duration has noticeably dropped. Voltage and capacity match OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCL15 and SL15 handset fit:\u003c\/strong\u003e\n    Both models share the same handset chassis, connector orientation, and 2.4V charging circuit. One battery covers both variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the CL15 base station cradle and confirmed the BMS accepted charge normally, voltage climbed cleanly to 2.8V at full charge, and the handset registered full signal bars throughout.\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 cradle and leave it for a full 16 hours before use. Ni-MH cells shipped in storage state need a slow, uninterrupted initial charge to reach rated 650mAh capacity — cutting it short leaves the pack under-conditioned for the first several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than the original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Ni-MH cells commonly deliver below-rated capacity for the first three to five charge cycles. This is a chemistry characteristic, not a fault — the cells need repeated charge and discharge passes to reach full electrochemical capacity. Each full cycle adds usable capacity until the pack stabilises near its rated 650mAh. Run the handset until it signals low battery, then return it to the base for a full charge, and repeat this three to five times before judging performance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not charging the handset after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH batteries discharged deeply during storage can present a voltage low enough that the base station's charging circuit refuses to engage — a protection threshold built into the base, not the battery. The fix is to let the handset sit in the cradle for up to 30 minutes undisturbed; most CL15 base stations trickle a small recovery current before switching to normal charge mode. If the charge indicator still doesn't light, remove the handset, wait 60 seconds, and reseat it firmly — poor cradle contact is the other common cause. Once the base accepts the pack, let it complete a full uninterrupted charge to 2.8V before use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340054986842,"sku":"BWCS-SX383CL-1","price":20.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340055019610,"sku":"BWCS-SX383CL-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340055052378,"sku":"BWCS-SX383CL-3","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SX383CL-1.webp?v=1778367047","url":"https:\/\/batteryweb.com\/products\/universum-cl15-replacement-battery-24v-650mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}