BT and fiber

[SUNRAY]

.

 

[TAMD8389]

sheep goes baaaaa

 

[morqthana]

Cow goes mooooo

 

[ebee]

You keep asking that.

Show me a maintenance charger which turns on when the battery drops to 20% of its capacity and off when it gets to 80%.

It would likely be a good charger to have.
I know from the SLA charging circuits in intruder alarm systems etc are designed to give a hopefully 13.6 to 13.8 volts dc charge or thereabouts for a constant trickle charge and the manufacturers tend to recommend an annual test by a competent engineer and reasonable expectation of lasting the course if limited to being renewed no more that 5 years.
In practice I`ve seen quite a few with a date indication and provided that they have sat in a not too severe temperature range and some gentle ventilation in that lifetime I have not seen many having useful life much after year 7 apparently.

So in that limited life cycle that 5 years seems a good approximation as a possible generalisation.
Outside of that then all bets are off.
The 20% - 80% suggestion probably has some sensible merits I suspect (for Lithium) indeed some mobile phone manuals/data do give a hint of the 80/20 being useful for charging.
It would be my "starter for 10" in the absence of other precise info.

 

[morqthana]

My laptop eats its battery - 4-5 hours is typical, and so I got lazy and just left it plugged in all the time. And it's beyond the wit of Dell to manage an 80/20 system, so now I have a new battery and a dodgy looking lithium pillow outside awaiting a trip to the dump. I know that the battery recycling bins in supermarkets don't actually say "please don't put lithium batteries which have gone puffy in", but....

 

[SUNRAY]

My laptop eats its battery - 4-5 hours is typical, and so I got lazy and just left it plugged in all the time. And it's beyond the wit of Dell to manage an 80/20 system, so now I have a new battery and a dodgy looking lithium pillow outside awaiting a trip to the dump. I know that the battery recycling bins in supermarkets don't actually say "please don't put lithium batteries which have gone puffy in", but....

My Dell from 2007 is still on it's original battery, I'll make a guess it has spent 80% of its on time on charge (and embarrassingly a lot of time on charge when not in use), it's down to ~1 hour now but it was only ~3 hours new. My lenovo of ~10 years has spent lots of time running off charge but now only lasts a few minutes down from ~4 hours.

Most of the supermarket depositries say domestic batteries only, I don't know if PC batteries... but who would know it's you?

 

[morqthana]

My PC is domestic. What else could it be?

 

[morqthana]

Eric's batteries are domestic. Tesla Powerwalls and similar are domestic. SLAs in UPS's and mobility scooters are domestic.

They don't mean "domestic", do they.

 

[morqthana]

who would know it's you?

Anybody who sees me trying to jam a laptop battery through the little slot on top of the bin...

 

[morqthana]

My laptop eats its battery - 4-5 hours is typical, and so I got lazy and just left it plugged in all the time. And it's beyond the wit of Dell to manage an 80/20 system, so now I have a new battery and a dodgy looking lithium pillow outside awaiting a trip to the dump. I know that the battery recycling bins in supermarkets don't actually say "please don't put lithium batteries which have gone puffy in", but....

Actually, it seems to be worse than that. So it's a new battery, still with (according to the laptop) its quoted 91.2Wh capacity, and from a 100% charge it's dropped in 3hrs 10 minutes to 16.9Wh - an average consumption of 23.5W.

I bought it s/h on Fleabay from someone who was selling it almost-new-and-hardly-used because when they bought it they didn't realise it was a Windows machine and thought it could run macOS. But we don't go there.

I got it for a good price, and when it turned up I was extraordinarily pleased to find it was a very good price, as the seller had misdescribed/misidentified it and it was the model with the 4K OLED display.

Which is a really nice display, but by gum is it power hungry.

 

[ebee]

Hmm Nice phrase "Domestic Battery" I never really thought about that term , I suppose that definition lays within the eye (Brain) of the beholder up to a car battery but then again if you have a garage within or attached to (so still within) your home then it can be classed as domestic. Yes I never really thought about it so one mans yes could be another mans no.

You could start another thread itself about what that term actually means. Even cause a bit of a riot of arguments!

 

[SUNRAY]

Hmm Nice phrase "Domestic Battery" I never really thought about that term , I suppose that definition lays within the eye (Brain) of the beholder up to a car battery but then again if you have a garage within or attached to (so still within) your home then it can be classed as domestic. Yes I never really thought about it so one mans yes could be another mans no.

You could start another thread itself about what that term actually means. Even cause a bit of a riot of arguments!

I took a couple of 2Ah SLAs and walkie talkie battery packs along with a load of AAs and hearing aid batteries to a Morrisons, I was politely asked not to deposit the SLAs and battery packs. My local Lidl had hand written 'domestic batteries only' (actually battries) lables on the depository tubes but I see they now have a bigger tub with a bigger opening so it may be different now.

 

[morqthana]

if you have a garage within or attached to (so still within) your home then it can be classed as domestic.

Why does it have to be attached?

You could start another thread itself about what that term actually means.

Well, I could, if for any reason I didn't believe a single dictionary.

Even cause a bit of a riot of arguments!

Oh I have no doubt that there would be people who would flatly refuse to accept the definition which appears to be in every single dictionary, and who would insist that the word means something else, either because they've always just assumed it means something else, or because someone equally obtuse once told them it means something else. But no matter how they've arrived at their private definition, they would deny and deny and deny the actual definition until the end of time.

 

[morqthana]

I was politely asked not to deposit the SLAs and battery packs.

I can understand that polite request.

And reciprocal politeness means you accede, rather than challenge them over their use of the word "domestic".

 

[helplessowner]

Last time I took some batteries up the recycling centre (local council tip) I also had a large laptop lithium battery.
Tipped all the AAs and AAAs into the battery box, then:
"Where does this one go?" I asked the attendant, holding up the large laptop lithium battery.
"in the battery box" said he.
"It's a big lithium battery" said I.
"Yes, and it goes with the other batteries in the battery box" said he.
So it joined all the AAs and AAAs.