This WWII-era battery still has what it takes to tumble with modern devices.
We’ve seen special batteries before that let you charge your devices in style, whether it’s a Super Nintendo controller or a Poké Ball.
But if you really want to have the coolest charger on the block, then you’ve got to get yourself a 70-plus-year-old Japanese battery, because apparently these things are built to last.
When Japanese Twitter user @hieiteitoku1121 showed off one being used to power a modern calculator, the Japanese Internet was in shock.
▼ “My calculator worked with a close-to-100-year-old battery.
Seems like it’s still generating power.”
▼ And here’s a video version showing the calculator not working when
not hooked up, then springing to life as soon as the battery is attached.
Gotta say, I’m incredibly surprised that not only was this ancient battery still working more or less perfectly, but the fact that it wasn’t leaking battery acid and causing a health hazard in the general vicinity feels like a miracle.
The original poster did claim that the battery was about 100 years old, but other netizens chimed in to try and track down its exact age. Originally it was believed to be about 100 years old since, after looking it up, the company on the battery produced them around 1918.
However, due to the kanji on the battery being written in the more modern style of left-to-right instead of the traditional right-to-left, others believed it was produced sometime around 1940, or possibly right before WWII. Either way, it’s still incredible that it survived all the way to today.
▼ And for anyone curious, it’s about as powerful as
a battery one-eighth its size today. Hooray for progress!
A very cool find for sure, but we do have to ask, is this a battery we can ship off to some idols so they can charge it up for us with their sweat?
Source/featured image: Twitter/@hieiteitoku1121

Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
New Japanese KitKats come in sakura flavour, with poetic symbolism for success
Howl’s Moving Castle’s scene-stealing dog is here to clean your home as a plushie mop
30 Pikachus want to share a Tokyo hotel room with you that has separate Grass, Water, Fire spaces
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
New Japanese KitKats come in sakura flavour, with poetic symbolism for success
Howl’s Moving Castle’s scene-stealing dog is here to clean your home as a plushie mop
30 Pikachus want to share a Tokyo hotel room with you that has separate Grass, Water, Fire spaces
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
How to make your own hoshi-imo Japanese dried sweet potato snacks【SoraKitchen】
Japanese curry chain in Thailand has a surprisingly Japanese dish not found in Japan
Expensive Japanese nail clippers: Are they worth it?
The 10 best day trips from downtown Tokyo【Survey】
Is this the most relaxing Starbucks in Japan?
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Starbucks Japan closing only Shinkansen platform branch for popularity-triggered renovations
Two food hacks take Japan’s convenience store fried chicken to amazing new sandwich heights
7-Eleven Japan’s new baked-in-store sweet treat is only available in three parts of the country
Man bites woman at cherry blossom park in Japan, dies shortly after
Peanuts and Coke becomes a viral hit in Japan, but is it a trend worth joining?
Can a downtown Tokyo super sento bathhouse beat a hotel for a one-night stay?
Japan now has a special desk for people who work at home with a pet cat[Photos]
Famous Tokyo cherry blossom spot installs view-blocking screens to fight overcrowding[Video]
Uniqlo announces new T-shirts for One Piece, Naruto and more for manga publisher’s 100th birthday
Train station platform ramen store closes its doors on half a century of history in Tokyo
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
How to make your own hoshi-imo Japanese dried sweet potato snacks【SoraKitchen】
Japanese curry chain in Thailand has a surprisingly Japanese dish not found in Japan
Expensive Japanese nail clippers: Are they worth it?
The 10 best day trips from downtown Tokyo【Survey】
Is this the most relaxing Starbucks in Japan?
Pringles Chocolate, but with a Japanese twist, is the snack hack you should be trying right now
Japanese people reveal the six western foods they find most disgusting
Japan’s permanent Pokémon theme park zone announces grand opening date, ticket sale start
Japanese politician arrested on charges of accepting bribes to reduce number of monkeys in park
The tragedy of Mononofu, the functional two-and-a-half-story bipedal robot【Pics & Video】
Mr. Sato’s mad Majima cosplay and other outfits from Mafia Day at SoraNews24HQ【Photos】
McDonald’s and Gundam team up for customized anime mecha and fried chicken sandwiches[Video]
11 different ways to say “father” in Japanese