Review on Orastone Rechargeable Hand Warmer - Electronic Portable Hand Warmer with Fast Warm-Up, Double-Sided Warming, and Reusability by Todd Phillips

The product is great in size and feel - I was glad it was small enough to hold like a disposable hand warmer. I also like the plastic strap that allows you to hang it on your wrist. However, the battery life of the product is extremely disappointing. I fully charged it three times and died after 60-90 minutes each time. Since the advertised battery life is 3-4 hours, that's a big discrepancy. I was planning on buying a few more to give as gifts but I don't trust the quality enough to buy more. Very confused.