Need Help about Battery Pack Setup
Need Help about Battery Pack Setup
(OP)
Hello Everyone,
I recently bought for hurricane emergency use here in Miami, a 7" LCD portable TV. It comes with a home power connection and 12v DC IN via a male plug for female vehicle cigarette lighter sockets. The internal battery is a Lithium Polymer 1800mAh which after we tested it, it lasted about 2 hrs.
To extend the watching time of the TV I want to have the option of plugging it into a battery pack. This needs to be simple so my elderly dad can use it so I'm thinking an easy way is of a pack that holds a set of D size batteries, connected to a 12v socket. So I have these questions since I'm an electrical novice:
1- What do I need to set a pack like that up? Is it just a matter of getting a battery holder and inserting 12 D batteries in it?
2- How long will 12 batteries last and is there a formula to calculate this?
3- If I go with a pack with more batteries, how do I make the connections to have 12v or does it not matter?
4- I also though about getting computer backup power box like those from APC and plugging in this AC/DC adapter: ht tp://www.m eritline.c om/car-cha rger-to-wa ll-charger -adapter-- -p-37050.a spx?source =nl100609& amp;hq_e=e l&hq_m =1985142&a mp;hq_l=88 &hq_v= c61b927e65 Will this work and if so how do I calculate how long one of those will last to power just this TV? I wonder if the rechargeability of it will make it more economical in the long run.
Thank you.
I recently bought for hurricane emergency use here in Miami, a 7" LCD portable TV. It comes with a home power connection and 12v DC IN via a male plug for female vehicle cigarette lighter sockets. The internal battery is a Lithium Polymer 1800mAh which after we tested it, it lasted about 2 hrs.
To extend the watching time of the TV I want to have the option of plugging it into a battery pack. This needs to be simple so my elderly dad can use it so I'm thinking an easy way is of a pack that holds a set of D size batteries, connected to a 12v socket. So I have these questions since I'm an electrical novice:
1- What do I need to set a pack like that up? Is it just a matter of getting a battery holder and inserting 12 D batteries in it?
2- How long will 12 batteries last and is there a formula to calculate this?
3- If I go with a pack with more batteries, how do I make the connections to have 12v or does it not matter?
4- I also though about getting computer backup power box like those from APC and plugging in this AC/DC adapter: ht
Thank you.
Bret
Miami,FL USA





RE: Need Help about Battery Pack Setup
A larger unit should outlast 8 (not 12) D-cells.
RE: Need Help about Battery Pack Setup
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If it's the black one with the 2 flat terminals, is all I need to do is to connect a female socket with a couple wires to it? How do I recharge it - trickle charger like for a car battery? How do I calculate how long it will last before buying?
Bret
Miami,FL USA
RE: Need Help about Battery Pack Setup
I think VE1BLL was referring to self-contained 12 VDC power sources. Stick the following term into Google:
Duralast jump starter
There are all sorts of capacities, other brands, etc... This is something you keep charged up from your house electricity, then it'll provide 12V for your TV via the automotive 12V lighter socket.
Good on ya,
Goober Dave
RE: Need Help about Battery Pack Setup
Well, I'm not finding the Duralast one but there are others I saw around $70 +. All depends on the power and that's what I'm still stick on. How do I calculate how long it will last?
The Battery in the TV w/ 1800 mAh I'm guessing = 1.8 Amps which lasted 2 hrs. So if I divide the 1800 by 900, I get 2 or 2hrs, so that works out right. A sample "Duralast" says it's 200 Watt & 400 Amp. So 400 = 400,000 mAh /900 = 444 hrs. the TV can run on it - that's doesn't look right at all - or is it?
Bret
Miami,FL USA
RE: Need Help about Battery Pack Setup
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RE: Need Help about Battery Pack Setup