About this replacement
Designed for JDSU, Viavi devices. Compatible models include VIAVI MTS-2000, Smart OTDR, Viavi Smart OTDR 100AS, E100AS, VIAVI 200AS, T-BERD, SmartOTDR Handheld Fiber Tester, MTS-2000 Handheld Modular Test Set. Replacement part numbers include 4-JS001P, 636395. Key specifications: 7.4V, 5000mAh, Li-Polymer.