Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
Replacement LG STYLUS 3 M400 Battery BL-44E1F Model LS777, LGMP450 / V20 H990, H918, H910, H990DS, H990N Capacity Li-Ion 3200mAh Compatible to your Smart Phones Support Fast Charger Long Lasting Original Equipment
Dr. Battery Advanced Pro Series Toshiba Portege M400-EZ5031 LTS017-AP 4400 mAh / 48Wh Notebook Battery - BattDepot United Kingdom