This is the summary of consumer reviews for OCOOPA Hand Warmers Rechargeable, 1 Pack 5200mAh. The BoolPool rating for this product is Excellent, with 4.60 stars, and the price range is $20 - $35.

The OCOOPA Hand Warmer is a single hand warmer that has three heat settings and holds a charge for hours. The brightly colored hand warmer fits in the palm of the hand and is narrow enough to slip into gloves or pockets for all-day warmth. Three heat settings get hot fast, and heat up to 130 degrees F on the highest setting. The device charges in a short period of time and also doubles as a power bank, where cellphones can be charged at the same time as heat operation.

Customers love this product because of the low price and the effectiveness of it. They say even the lowest heat setting gets hot fast, and some of them do not even use the highest setting because the lower ones are warm enough. They say it lasts for at least a few hours at a time, which is perfect for those who work or play outside in the colder climates. 

Some say the highest heat setting is too hot. They say it could be dangerous, although the product has undergone significant safety examinations.