Laptop charges off 12v battery/inverter when full, stops after a while

[Specialist]

Hi SC, you may be surprised what the landlords of HMO's get away with.
Unless tenants complain to the landlord then nothing will get done, if the tenant complains then it's often bye bye & next please.
It's a vicious circle really & councils don't do much until there's a real stink created by someone or God forbid someone gets hurt.

 

[SparkyChick]

I wouldn't be surprised, I must admit I went looking for info about minimum requirements for HMOs when Tara first posted about this and the jumpstarter she was using. All I could find was minimum requirements for kitchens. Other than that, it does seem it's entirely down to the landlord, which I thought was shocking.

But, based on her first post, if I was planning on being there a year, I'd be asking the landlord if they'd do something about it, especially in this day and age when practically everyone has at least one battery operated gadget that needs regular charging.

 

[Specialist]

To be fair, the majority of landlords are pretty good & give their Tennant's decent accommodation, especially when they're expecting colleges to send students their way.
But some of the others can be really bad, some of the HMO's around Pontypridd a few years back were atrocious.

 

[Octopus]

Can we go back to basics?

Why are you trying to use this set up?

 

[HandySparks]

Can we go back to basics?
Why are you trying to use this set up?

Tara, I'm going to suggest something radical... how about asking your landlord if they'll get a power outlet or two installed in your room?

From the OP's info, I'm guessing that this is for use on a boat.

How do you plan to charge the 12V battery?

 

[SparkyChick]

Tara originally posted about using a jumpstarter pack to power her laptop in her room (via an inverter I believe) in a house. The issue was that the jumpstarter pack took a very long time to charge. She was advised to use (if I recall correctly) decent lead acid leisure batteries and a charger specifically designed for the purpose.

I'm assuming this is a continuation of that saga, I could be wrong.

 

[Octopus]

^^ guessing isn't going to help.....

We need facts...

I tried an inverter on a canal boat..... It only worked when the engine was running

 

[telectrix]

and cheap inverters produce a shitty output waveform

 

[freddo]

A laptop PSU designed for a 12V input is much more efficient, mains inverters are very wasteful and will drain batteries quite quickly. I get about 3 hours heavy charging out of my 12V 7AH SLA battery when connected with my 12V laptop charger, your 24AH battery would last much longer if you ditched the inverter and got a 12v laptop charger.

 

[DPG]

Agree with Fredd0 - no point stepping up from 12V to 230V and then back down to 19V with 2 lots of inefficiences. Use a 12V laptop charger and ditch the inverter (which is probably a horrid cheap quasi-sine wave output anyway).