Specification: Item name: HOTRC A400 Battery Charger Weight:138g Size:About 100*60*30mm Max charge current:3a Battery type:3s/4s lipo Balanced current:300mah/cell Max charge power:40W Charge stop voltage:4.2V ±0.02V Shell material:ABS+pc fireproof material Display accuracy:±0.05V Packaging included: 1 x charger , , , , , , , , , ,