J**
Makes 3.5 cups of coffee!
This thing works like gang busters. With the original battery that came with my cauldron cup I could only get 1.5 cups of coffee, with this new battery I can make 3.5 cups. It takes quite a while to charge fully, but in my opinion it's totally worth it.
N**5
Great extra battery for Cauldryn bottles and mugs.
Battery works great haven't gotten a chance to really put it to any hard tests like boiling away from another power source but it did keep water for my tea hot for several hours without it dropping much in the way capacity. This battery is heavy and tall but with the 2 USB A ports and the double capacity compared to the "small" battery pack you find bundled with most versions of the mug/bottle it's an excellent addition.
E**F
Keeps coffee hot
A little glitchy but works great while I’m ice carving
E**N
Lo garantiso en mui rendidora
Es perfecta dura mucho
S**Y
Long lasting
Lasts for a long time but weighs a lot unfortunately so not easy for carrying with the mug.
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