Replacement battery fits 7 Pulsar compatible models. Specifications: 3400mAh, 3.7V, Li-ion. Compatible with: Axion XM, Axion XQ, Axion XQ LRF, Digex, Proton FXQ, Proton XQ and 1 more compatible models. Replaces: Pulsar APS 3, Pulsar PL79161. Pulsar replacement battery designed for Telescope devices. A direct drop-in replacement for the original battery.