High capacity mobile batteries on Amazon Japan

Does anyone here have one they can recommend? I’m looking for 25000mAh+.

The one I’ve been using the last six years seems to be dead now. It was a random Chinese off brand, and neither the fake brand name it had nor the seller has any mobile batteries now, or I’d go for the same as it outlasted my expectations. My phone’s internal battery is junk, so I used it quite regularly and have had bad luck with any other mobile batteries (bought locally, but cheap) after the first couple charges.

Most reviews on Amazon aren’t written after long-term ownership, and I want to know about people’s experiences with ones that lasted a long time, which is why I’m posting here.

Edit: if you can strongly vouch for one not on Amazon that fits my criteria, I’d like to know about that as well, I just have Amazon credits I’m hoping to use.

4 comments
  1. mAh is not an unit that allow you to compare capacities directly. Look for wattage instead.

    Anker is usually ok.

  2. Slightly smaller than your criteria (24000mAh), but I have been pretty pleased with my Anker 737 Power Bank to date. It’s a recent purchase though.

    Prior, I used a Sony CP-S20AS, and it is still going strong like 5 years later The longevity comes with price tag though. Seems like the model is now discontinued and all newer Sony models are smaller. But if you want to splash out, Amazon still lists some CP-S20AS units – again, slightly smaller than your target size.

  3. Just like other people said, anker is safe bet.
    737 powerbank is probably best fit for you.

    For smaller size, something like 511 powercore is pretty nice too since it’s basically wall charger + powerbank in one package.
    Very convenient for small trip where you have easy access to power socket.

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