Portable powerbank outputs

austin

Well-Known Member
One for Mr Lutin Ibthink.....I bought a portable power bank from Aldi today -£9.99 for 7800 MaH. Lithium Ion batteries. A bargain I think. It has two outputs one rated for 5v 1Amp, the 5v 2.1 amp.

I mostly want the thing for recharging mobile phones and Bluetooth headsets when camping.

Question - if a plug my phone into the 2.1 amp output will it damage it? My phone needs a 0.5 amp charger but has always been fine plugged into a 1amp device. But 2.1amp output may be a bit too much. I always assumed a device could only consume the power it needed and if more power was available it didn't get used. Eg, mains ring at home rated 30amp but if I plug in a 60watt bulb (0.25amp at 240v) the 30 amps available does not damage the bulb and I only use 0.25amps worth of electricity.

Is it the same for charging batteries or does the battery just suck up electricity as fast and as much as it's available with potential damaging effects.
 

Philwhiskeydrinker

Well-Known Member
I'm sure your phone only uses whatever it uses.
My powerbank has the same set up & I just plug it into whichever port without a second thought.

Thinking about it, do you give a second thought of the fuse rating when charging with a ciggy socket 'cos I don't.
I'm pretty sure modern eleccys are pretty good at sorting their own stuff out (within reason).



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austin

Well-Known Member
I have bought an anti gravity battery. Had it for three years it also give you option of bumping one of the beasties if the battery fails.
Antigravity Batteries UK, Lithium Motorsport Batteries

For Sharrie i bought a sealy unit. Woman always have more to charge? This thing can jump start the sun.
Sealey Lithium-ion Jump Starter/Power Pack 405A 12V | Autosessive

Both units are compact and compatible with all my ios kit.


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Thanks. A bit of overkill for charging a phone though. :shoot:
 

austin

Well-Known Member
I just googled it and answered my own question. It was as I suspected - the device only consumes what it needs. I just wondered if connecting battery to battery change the principle. It seems it doesn't, probably coz there's actually some gadgetry in-between.
 

Lutin

Administrator
Staff member
Forum Supporter
I just googled it and answered my own question. It was as I suspected - the device only consumes what it needs. I just wondered if connecting battery to battery change the principle. It seems it doesn't, probably coz there's actually some gadgetry in-between.

Yep, that about covers it.
 

DaveS

Administrator
Staff member
Forum Supporter
I’ve just read an article on mobile device charging. It’s an interesting area.
The only other thing I can add is that the phone will suck more juice initially and then tail off at around 80% charge.
Quite often the 1.2 amp chargers won’t put enough juice in to my iPhone 7 Plus than it’s using at that time so even though on charge it goes backwards, albeit more slowly.
 
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