Power bank that can be recharged fast.

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alpg88
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with a power tool charger, that is a 20v power tool battery, they come in 1.5, 2 , 3, 4, 5, 6 ,9 AH it takes up 1.5 hour to recharge,
yea it is bulky, if you want something portable look for power bank with usb C plug, regular micro usb can not provide enough current to charge fast, usb c can provide for up to 40 watts at 5v.

wle
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d_t_a wrote:
Wouldn’t very rapid charging powerbanks have notably shorter life cycles?

not necessarily, if temperature limits are kept.

(might require fans for really fast charging)

you can charge to 80% as fast as you can remove the heat, basically.

wle

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ZoomieFan
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My take on fast charging. I’m sure someone will kick my butt if I’m talking nonsense….. Smile

Some cells allow for a much higher recharge current as their competition. (Sony IIRC)

A 20,000 mAh PB often contains 8 cells.
Very often charged with 2A because that’s the USB micro limit.
My 26800 mAh PB has 2× 2A in. Still very good after many recharges.
It recharges in about 6 hours with 20 watts.
With 8 cells that 4/8=0.5A cell. I think that can be safely upped a bit. Total 8A perhaps.
I’ve yet to find a charger that does 8A at 5v, but using 20v I’ve seen up to 65watt

And as I wrote earlier: If the PB degrades from fast charging, how much, how fast?
10%/year or 1%/year. Big difference. Plus often I don’t care about speed and I could use a less powerful charger.
But when traveling I often want as fast as possible.

While my PBs cells are still in great shape the ports are not. It’s an EasyAcc, which may not be the top brand, but it’s not junk either.
2 ports can hardly/not be used.
2 ports work with certain cables (looks like the plugs are not 100% the same size)
Point being, while the cells may last another 10 years the ports will be dead long before that.
Plus, even if everything was still in mint shape I would still want to go faster.
There’s just a lot of room for improvement in PBs, size, weight, (re)charging speed, new protocols, etc.

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88 4/5, LiitoKala: 3x100 3/5, 2x202 3/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

ZoomieFan
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Is TOPK a good PB brand?

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88 4/5, LiitoKala: 3x100 3/5, 2x202 3/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

FlashSusanne
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Hey there,

I have found an article about the Powerbanks that charge fast. They all have 10000 mAh, so thats pretty nice. Anyhow, hope I was helpful: https://www.technikhiwi.de/powerbank-10000mah-test/

Cheers!

Fescron
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ZoomieFan wrote:
https://www.aliexpress.com/item/32885267714.html?spm=a2g0o.productlist.0...

Found another one. 20000 mAh, recharges itself, with 60W, in 1.6 hours.
I think the 1.6 hours is overly optimistic comparing with other power banks.
A picture shows it has 8 cells, which works out at 2500 mAh per 18650.
Replacing them with 3500 mAh ones would bump up capacity to 28000 mAh.
I wish there would be empty banks for sale with top notch input/output ports….

Same here about those empty power banks. I found this one recently https://nl.aliexpress.com/item/1005001379653229.html?spm=a2g0s.8937460.0... (24000mAh with DC jack/type c in/out and USB A/C out) and asked the seller if I could get it without batteries inside because of the cheap price. He told me first off they don’t offer support for that but I assured it that was no problem, and afterwards he got back to me with a price quote of about $220. Still way more than I hoped but hopefully there will be more versions like this in the future!

ZoomieFan
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@Frescon
Very steep price… but the charging speed is absolutely great.
It’s not clear what’s DIY about this PB. Nowhere I see I can quickly swap cells.
I’m gonna skip this one because of the section highlighted in red.

Quote:
Playing around with C1 and DC related functions causes burning of low-power devices such as mobile phones.

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88 4/5, LiitoKala: 3x100 3/5, 2x202 3/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

Fescron
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ZoomieFan wrote:
@Frescon Very steep price… but the charging speed is absolutely great. It’s not clear what’s DIY about this PB. Nowhere I see I can quickly swap cells.

Same feeling about the price and capabilities, I hope there will follow other devices like this but with a lower price. Yeah the “DIY” part is probably to attract people to the listing. Cells can’t indeed be quickly swapped, you have to create the battery-pack yourselve using a spot welder (in the case of the PCB/enclosure only quote).

ZoomieFan wrote:
I’m gonna skip this one because of the section highlighted in red.
Quote:
Playing around with C1 and DC related functions causes burning of low-power devices such as mobile phones.

Ah yes good catch I didn’t even notice that…

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