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Old 08-18-2015, 02:37 PM   #1
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TracerPower battery pack

Anybody tried one of these for backup power? looks like an amazing amount of energy in a lightweight package, although quite costly.

TracerPower.com Tracer LiFePO4 Battery Packs
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Old 08-18-2015, 03:15 PM   #2
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Anybody tried one of these for backup power? looks like an amazing amount of energy in a lightweight package, although quite costly.

TracerPower.com Tracer LiFePO4 Battery Packs
Wonder if they're sold anywhere outside the UK. Shipping could be costly and complicated due to the chemistry involved.
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Old 08-18-2015, 03:23 PM   #3
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Wonder if they're sold anywhere outside the UK. Shipping could be costly and complicated due to the chemistry involved.
I've done a quick search but can't find any North American suppliers. Shipping is about $100 from UK.
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Old 08-18-2015, 03:30 PM   #4
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I've done a quick search but can't find any North American suppliers. Shipping is about $100 from UK.
Try an Amazon or Google search using the battery chemistry:

LiFePO4

You'll find some choices. No knowledge about these, but am curious.

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Old 08-18-2015, 03:58 PM   #5
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Try an Amazon or Google search using the battery chemistry:

LiFePO4

You'll find some choices. No knowledge about these, but am curious.

Bill
Found one supplier in Ontario Canada,
Smart Battery
24AH 12V is $472 CDN plus shipping

The 25AH UK one was $399US (507 CDN) plus shipping
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Old 08-18-2015, 06:43 PM   #6
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They are a slightly different chemistry than LiPo batteries.
LiPo are used in remote controlled cars and airplanes and mostly, now, drones.
If LiPo batteries are punctured or over charged or under charged they give off a very high temperature stream of gas.
I believe around 600 degrees.

These batteries have none of those problems.
They were used in the Dewalt battery powered tools for awhile before the company building them almost went bust.

The company was A123 and I think they were rescued by a Chinese company.
Check their website www.a123systems.com

They use a very different charging system than the ones we have on our trailers.
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Old 08-18-2015, 06:56 PM   #7
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They are a slightly different chemistry than LiPo batteries.
LiPo are used in remote controlled cars and airplanes and mostly, now, drones.
If LiPo batteries are punctured or over charged or under charged they give off a very high temperature stream of gas.
I believe around 600 degrees.

These batteries have none of those problems.
They were used in the Dewalt battery powered tools for awhile before the company building them almost went bust.

The company was A123 and I think they were rescued by a Chinese company.
Check their website www.a123systems.com

They use a very different charging system than the ones we have on our trailers.
Wasn't thinking of using them to replace the escape batteries just as a power pack to use if the batteries on the escape get too low after extended time without driving or sunshine. Would charge at home before I left.
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Old 08-18-2015, 07:12 PM   #8
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Wasn't thinking of using them to replace the escape batteries just as a power pack to use if the batteries on the escape get too low after extended time without driving or sunshine. Would charge at home before I left.
I would think the cost is prohibitive.

here is a 26Ah 12v
BT-12V26 | 12 Volt - 26Ah Rechargeable SLA Battery

$106 cdn.
but it weighs 20 lbs.
but a cheap Canadian Tire charger can charge it up for you.
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Old 08-18-2015, 07:16 PM   #9
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I would think the cost is prohibitive.

here is a 26Ah 12v
BT-12V26 | 12 Volt - 26Ah Rechargeable SLA Battery

$106 cdn.
but it weighs 20 lbs.
but a cheap Canadian Tire charger can charge it up for you.
That looks like a great alternative. Thanks for that.
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Old 08-18-2015, 07:22 PM   #10
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Originally Posted by jxoco View Post

here is a 26Ah 12v
BT-12V26 | 12 Volt - 26Ah Rechargeable SLA Battery

$106 cdn.
but it weighs 20 lbs.
but a cheap Canadian Tire charger can charge it up for you.
For those lucky enough to live in the land of the dollar:
12 V, 26 Ah, SLA Battery

$66 US.

Everything else is the same as the above.

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(Info tidbit: SLA is short for Sealed, Lead-acid. Same basic chemistry as ordinary batteries but no water to check, very low self-discharge, doesn't leak when on its side. Charge once or twice per year and ignore it.)
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Old 08-18-2015, 07:41 PM   #11
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$66 US.

That's a Good deal.

What DO you Americans do with all of your savings?
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Old 08-18-2015, 07:41 PM   #12
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Guess I don't get the point, besides needing there own charging setup, they are very low Ahr, meaning you'd need at least a few of them to amount to anything significant. Do they have the same 50% drain limits? if so you only have 12Ah usable per battery. A bit more then that on the SLA's.

Wouldn't it be more cost effective to just add another full size battery? What are we talking, another 40 or so pounds over the Lithium?

Something like these I can see, at least if the price comes down.200 Amp-Hour Lithium Battery | Lithium Batteries
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Old 08-18-2015, 08:49 PM   #13
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Originally Posted by hughharden View Post
Wasn't thinking of using them to replace the escape batteries just as a power pack to use if the batteries on the escape get too low after extended time without driving or sunshine. Would charge at home before I left.
Quote:
Guess I don't get the point,...
As a power pack for a couple of hours - it would probably do the trick. On a regular basis? Not very practical.

Personally - I'm waiting for that 40 pound lithium battery with 200 Ah that costs $99.

Still waiting...

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Old 08-18-2015, 08:50 PM   #14
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... What DO you Americans do with all of your savings?
Buy trailers...
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Old 08-18-2015, 10:46 PM   #15
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What DO you Americans do with all of your savings?
We save them for a trip to Canada.
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Old 08-18-2015, 10:56 PM   #16
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Lithium batteries - including these LiFePO4 types - do need special treatment. A nice feature of those packs from the UK is that they are not just batteries:
Quote:
Integrated Electronic ‘Battery Management System’ (BMS) provides the following protection:
  • Overcharge & over-discharge protection
  • Thermal protection
  • Over current protection
  • Short circuit protection
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Do they have the same 50% drain limits?
No, it seems generally agreed that these lithium batteries can be safely discharged repeatedly down to a few percent of their capacity - that's about half of their advantage over lead-acid (the other half being that they are less dense so the same volume of battery weighs much less).

I agree that the cost/benefit situation doesn't yet favour lithium for most RV purposes.
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