About this replacement
Designed for SAILOR devices. Compatible models include SP3510, SP3515, SP3520, SP3520 VHF GMDSS radio, SP3520B, SP3530, SP3540, SP3550, SP3560, SP3500. Replacement part numbers include 403504A, B3502, B3504, B3501. Key specifications: 9.0V, 2800mAh, Li-SOCl2.