I got mine on Amazon about 2-3 years ago and it hasn't let me down. On very rare occasions will it flash but I'll be in extremely odd positions. If you let it charge 15min itll be good for another 2 hours or more. Full charge lasts around 3-6 months currently with mine but you can easily tell with the low battery signal instead of getting caught off guard. The hand gesture is amazing but you have to atleast have a small light source for it to tell when to switch. Sometimes it will switch when moving around but theres a grind mode warning that'll give you a heads up. I'm looking for a back up one since it is old but I'm excited to see if it lasts me even longer.
