Charging a phone from a 12V SLA battery

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#1327063 18-Jun-2015 09:44

Thanks Jimbob, sounds like a decent option.

jimbob79

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#1327083 18-Jun-2015 10:02

Also you might want to include a in-line fuse. I know you did not wnat to go down the DIY path but I can't see any 'off the shelf' products which fits your requirements.

http://www.amazon.com/Plastic-Coated-Blade-Inline-Holder/dp/B00EZE6Y2U/ref=sr_1_7?s=automotive&ie=UTF8&qid=1434578252&sr=1-7&keywords=inline+fuse

timmmay

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#1327103 18-Jun-2015 10:24

Fuse? We don't need no steenking fuse...

Can I easily buy one in NZ?

Ordered that ebay product above btw, thanks.

huckster

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#1327150 18-Jun-2015 11:19

timmmay: Fuse? We don't need no steenking fuse...

Can I easily buy one in NZ?

Ordered that ebay product above btw, thanks.

Something like this I would say....

http://www.jaycar.co.nz/Passive-Components/Circuit-Protection/Cylindrical-Fuses-%26-Holders/3AG-In-Line-Fuse-Holder/p/SZ2015

gzt

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#1327153 18-Jun-2015 11:22

Options:

http://www.ebay.com/bhp/12v-usb-hub

1101

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#1327154 18-Jun-2015 11:23

: I'd be VERY wary of something that cheap.
Isn't this something that might be very important one day? When was the last time you heard of cheap crap lasting the distance? Would you recommend someone get a $10 HDD as an emergency backup?

Yes I agree, good hard drives used to cost many hundreds of dollars. Server hard drives still can cost $300++
Who in their right mind would buy a $70 WD sata hard drive or $90 USB hard drive ???
:-(

Ive bought plenty of cheap stuff, most of it does the job. Do you really think the $50 12v-to-USB device will be any different than something for $10
Probably same thing with a different label.
Stuff sourced direct from china is insanly cheap, the issue is most assume that paying more is an indication of quality. It isnt.
Ive been hearing this cheap=nasty line for years, often from those who simply will not accept that cheap stuff is often good enough to do the job.
Sometimes the Asian brand at 1/4 the cost is simply better.

Anyway, try Bangood , Goodluckbuy, Gearbest. They will have something, but you may have to attach connectors that will clip onto the batt.
Go to bangood, have a look at just how cheap stuff really is. Its only when it hits NZ shops that the cost is what we are used to.

timmmay

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#1327159 18-Jun-2015 11:29

This one looks pretty good, well polished. Probably should've held off until I got more opinions, but the other one at $5 could be a good backup :)

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gzt

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#1327165 18-Jun-2015 11:36

Check the charging current. Also, fusing is a must.

timmmay

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#1327179 18-Jun-2015 11:48

I was hoping not to DIY this one, I wonder if any of those products have a fuse built in. If not I can get a fuse holder, fuse, and put it into a little box. Could be messy, but this is disaster scenario use so as long as it's functional and reliable I don't really mind.

jimbob79

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#1327184 18-Jun-2015 11:51

timmmay: Fuse? We don't need no steenking fuse...

Can I easily buy one in NZ?

Ordered that ebay product above btw, thanks.

Also just to let you know it took 15 days for the item to be deliver from the day I ordered it.

timmmay

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#1327224 18-Jun-2015 12:25

Ta - that's about typical for cheap ebay stuff.

gzt

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#1327259 18-Jun-2015 13:13

another one.

http://www.thinkgeek.com/product/16cc/

Claims built in fuse but does not say where. Might be in the cig plug.

Just had a thought you might not want high power charge x4 if you are using a small SLA and limited capability.

timmmay

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#1327264 18-Jun-2015 13:20

gzt: another one.

http://www.thinkgeek.com/product/16cc/

Claims built in fuse but does not say where. Might be in the cig plug.

Just had a thought you might not want high power charge x4 if you are using a small SLA and limited capability.

Looks like a good product, more commercial, though I'd have to replace the cable to go onto the battery. More expensive too.

Right now I only have a 7AH battery while I'm testing, but I'll probably end up with a 28AH Panasonic long life battery, or similar. It's complete overkill of course.

Given I'll use the 7AH battery as a UPS and the big battery as standby I may need an additional SLA charger. The trick will be finding one that says it can support a battery that large. The Sentry Lite unit I'll use it with said it'd be fine, it limits charge current at 400mah so it would take three days to charge, but I don't really care if it takes a week.

aros71

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#1327353 18-Jun-2015 14:28

timmmay: Connecting one of these to an SLA battery would be a pain.

That's why you need to add one of these: http://www.jaycar.co.nz/p/PP2007

timmmay

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#1327393 18-Jun-2015 15:16

aros71:
timmmay: Connecting one of these to an SLA battery would be a pain.

That's why you need to add one of these: http://www.jaycar.co.nz/p/PP2007

Yeah easier just to use the ebay version, thanks.

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