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Travel + Leisure's best-battery pick: it heats in seconds and runs up to 14 hours on low. Wirecutter rejected it because none of its settings were comfortable in bare hands and it charges a phone only while it is itself plugged in. It also takes hours to recharge and costs about $50.
Top complaints
- Too hot for bare skin
Wirecutter found none of the settings comfortable for bare hands. Travel + Leisure says the highest level is much too hot for direct skin contact, and Survival Frog itself calls high 'burning hot' and suggests medium.
- Very slow to recharge
Travel + Leisure says it takes a very long time (several hours) to fully charge, so you need to charge it overnight.
Source: Travel + Leisure - Power bank works only while plugged in
Wirecutter found it works as a power bank only while the warmer itself is being charged, which defeats the purpose, and calls it one of the most expensive devices it tested. Travel + Leisure did use it as a portable phone charger.
Source: Wirecutter (NYT), Travel + Leisure
What owners love
- Longest battery in Travel + Leisure's test
Up to 14 hours on low and six on high, surviving five uses without running out (Travel + Leisure). The maker lists 6 to 14 hours from a 9,000 mAh battery.
- Heats almost instantly
It gets hot in under 10 seconds, delivers a surprising amount of heat for its size and held steady heat levels (Travel + Leisure).
Source: Travel + Leisure
- You want to hold it in bare hands
- You want a real on-the-go phone charger
- You need a quick recharge
- Long, very cold days with the warmer in a pocket
- People who want a lot of heat fast
- Cold offices or evening events on low
Scores (tap for why)
What experts say
- Travel + Leisure: Best battery life (updated 2026-08-26). The catch is a very long recharge.
- Wirecutter (NYT): Dismissed: no setting is comfortable in bare hands, the power bank works only while charging, and it's one of the most expensive models tested.