How long do they stay warm on one charge?

The maker claims 8 to 18 hours, tested at 77 degrees Fahrenheit. Expect the low end in cold outdoor use, since battery runtime falls as the air gets colder.

How do I charge them and how long does it take?

Each warmer charges over USB at 5V/1A and takes about 3 to 4 hours. A USB cable is included; a wall adapter is not.

Can I use both warmers at once?

Yes. The pair is meant to warm both hands at the same time, or you can hand one to someone else.

Are they safe to leave charging?

The maker describes an explosion-proof design meant to guard against overcharging. Still use a reputable USB adapter and unplug them once the lights show a full charge.

Two hand warmers and one USB cable. The batteries are built in.

How big and heavy are they?

Each weighs about 196 g (6.91 oz) and is compact enough to pocket or hold in a fist.

Where is the Bulldog Cartoon Rechargeable Hand Warmers cheapest?

At Deal.ai, for $36.99, as of our latest check.

Is the Bulldog Cartoon Rechargeable Hand Warmers at its lowest price?

The lowest price we've seen is $29.34 at Deal.ai on November 12, against $36.99 now.

Free shipping on everything10% off your first orderNo account needed · Buy 2, save 10% · 3+, save 15%

Bulldog Cartoon Rechargeable Hand Warmers

Sold and shipped by Deal.ai

$36.99Free shipping

Buy 2, save 10% · 3+, save 15%

Extra 10% off your first order

Arrives about Nov 17–26, from a US warehouse

30-day full refund: if you're not happy with it for any reason, or it never arrives, tell us within 30 days and we refund you in full. Shipping and refunds