About this replacement
Designed for Navilock, GNS, i.Trek devices. Compatible models include BT-315, 5840, 5843, M3 BT GPS, BT-338, BT-318, BT-318X, BT-335, BT-821, RBT-2010 BT GPS, SiRF Star III. Replacement part numbers include NTA2236, LIN302. Key specifications: 3.7V, 1800mAh, Li-ion.