Replacement battery fits 16 HP compatible models. Specifications: 450mAh, 3.7V, Li-Polymer. Compatible with: Mio MIVUE 308, Mio MIVUE 328, Mio MIVUE 358, Mio Mivue 388, Whistler WP7, Whistler WP7 PRO SP7 and 10 more compatible models. Replaces: Mio 582535, Mio (1ICP6/26/36). HP replacement battery designed for Dashcam devices. Simple plug-and-play replacement requiring no modification.