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What can I say? They are batteries. They charge. They power my heated socks. Can’t fault them 🙂 They are however, quite heavy if you’re doing long distance on the bike. I treat them as a little extra weight training in Winter so that Spring cycling suddenly feels easy!
Appear to work well further time required
A useful addition if you want continuous warmth. The batteries re-charge in time to replace discharged batteries when wearing items over a number of hours.
Fit well into the socks and recharge well – not too heavy and bulky to wear.
Great