{"product_id":"acterna-mts-5100e-replacement-battery-108v-4000mah-ni-mh","title":"Acterna MTS-5100e OTDR Replacement Battery 10.8V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eActerna MTS-5100e \/ MTS-5000 Series — 10.8V Ni-MH Replacement Battery (TY3CGR18650D-2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 4000mAh Ni-MH battery pack for the Acterna MTS-5100e and MTS-5000 optical time-domain reflectometers. It also fits the OTDR E6000 and Anritsu Lite3000(E) platforms that share the same voltage rail and connector. Cross-referenced OEM part numbers include TY3CGR18650D-2, N9330B-BCG, N9330B-BAT, 72R6893, NF2040AG24, NI1030, NI1030U, and RWS35.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-platform fit — MTS-5000 \/ E6000 \/ Lite3000(E):\u003c\/strong\u003e\n    These instruments share a 10.8V three-cell Ni-MH architecture, identical connector pinout, and compatible BMS handshake logic. That common spec is why one pack covers all of them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on an MTS-5100e under active OTDR trace acquisition. The BMS held charge delivery steady through laser pulse sequences without triggering a low-voltage cutoff or fault flag on the instrument display.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration on OTDR instruments:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the instrument menu before field deployment. The MTS-5100e maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement session, even when the pack is fully charged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout after the MTS-5100e sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day. After extended storage, cell voltage can drop below the BMS recovery threshold — typically around 0.9V per cell. At that point the BMS enters a protection state and the instrument sees no battery at all. A slow pre-charge at 0.1C using a bench charger with a Ni-MH recovery mode is the correct fix. Once cells recover to approximately 1.0V per cell, the BMS releases and normal charging resumes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOTDR display showing inconsistent charge percentage at every reboot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MTS-5100e tracks battery state against a stored voltage-threshold profile. A new pack has slightly different open-circuit voltage curves than the depleted cells it replaces. Until the instrument completes two or three full charge-discharge cycles, the displayed percentage recalibrates and may read high or low at startup. Run the instrument through complete drain-and-charge cycles under normal OTDR operation. After three cycles the readings stabilise at the correct threshold mapping.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360771113050,"sku":"BWCS-AMT510SL-1","price":155.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360771145818,"sku":"BWCS-AMT510SL-2","price":184.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360771178586,"sku":"BWCS-AMT510SL-3","price":205.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT510SL-1.webp?v=1778616259","url":"https:\/\/batteryweb.com\/products\/acterna-mts-5100e-replacement-battery-108v-4000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}