{"product_id":"best-access-systems-1003-replacement-battery-6v-2300mah-alkaline","title":"Best Access Systems 1003 Replacement Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBest Access Systems 1003 Series — 6V Alkaline Replacement Battery (DL-40)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline replacement for the Best Access Systems DL-40 battery. It fits the 1003, 11PDBB, 30HZ, 35HW, and more than a dozen other Best Access electronic door lock models. Voltage and capacity match the original spec exactly — the lock's control board draws a steady low-current load and is sensitive to both.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across the Best Access lock range:\u003c\/strong\u003e\n    These lock models share the same 6V power rail, DL-40 form factor, and battery contact orientation. One battery covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through lock and unlock operations on a Best Access unit. The control board drew consistent current with no voltage sag that would trigger a low-battery alert under normal use.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting fresh batteries, test every access method — keypad, key card, or credential reader — before closing the door. Some Best Access locks perform a control board reinitialisation after power loss, and access methods may not respond until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning immediately after installing a new DL-40\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eBest Access lock controllers compare battery voltage against a stored threshold at startup. If the batteries sat in storage for an extended period, their open-circuit voltage may read slightly low at first draw, triggering the alert even though the cells are not depleted. Remove and reinsert the battery pack to force a fresh voltage sample. If the alert clears, the lock has accepted the charge state. If it persists, verify the battery is seated with correct polarity — a reversed cell reads near zero volts to the controller.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor slow or unresponsive after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Best Access lock motor pulls a short high-current spike on each throw cycle. If the installed battery is below full charge — common with old stock — voltage can sag under that load and the controller may cut the motor mid-cycle or not engage it at all. Check the open-circuit voltage of the DL-40 before installation: it should read at or above 6.0V. Anything below 5.8V under no-load is insufficient for reliable motor operation on this platform.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360201539674,"sku":"BWCS-SDL400SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360201572442,"sku":"BWCS-SDL400SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360201605210,"sku":"BWCS-SDL400SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL400SL-1.webp?v=1778610960","url":"https:\/\/batteryweb.com\/products\/best-access-systems-1003-replacement-battery-6v-2300mah-alkaline","provider":"BatteryWeb","version":"1.0","type":"link"}