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12V 10000Ah Lithium Battery


trogre

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Hi All. Just looking for advice on a 12v 10000Ah lithium battery for sale on ebay uk. I did notice that on ebay.com (USA) they have the same battery for sale. The one I am looking at is available in the UK but the rest come from either China, Hong Kong or Guernsey.

I have no experience in lithium batteries and to me it does seem cheap @ £20.78 inc p.p, Ebay UK No 152224745914            
The same batteries (and photos) on sale on ebay.com are between $22-25 inc p.p, Ebay.com No 182063039389 .

It could well be that 12v lithium batteries are coming down in price anyway. The things that puts me off is the description on the ebay seller has the charger included but seller then states the charger is not included which means another £10 on top of that price. Another thing is the seller has 209 negative feedbacks for one month!! Not good!!

The specs if you do not have a look are:-

DC 12V 10000mAh Rechargeable Protable Li-ion Battery Lithium-ion+UK Plug Charger

Specifications:
input voltage: 12.6 VCD
output voltage:12.6-10.8 VCD 10000mAh
Capacity: 10000mAh
Charger AdapterUK


Package Included:
1 X Lithium-ion battery
1x Charger Adapter !!!!!!!!!!!????????

I will hoping if this is ok to power a dew heater strap & controller for a 8” sct for about 2 hours. If power is not enough and the item seems too cheap for what it is I will give it a miss.

Thanks for any input.

P.S No idea why some type is highlighted in a white box,sorry

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Based on the voltages 12.6 - 10.8 this is a LiPo and not Lion, it looks like a 3 cell LiPo also.  They need special chargers and if it did come with the charger pictured at some point it could catch fire and you wont be able to put it out, ref hoverboards, quadcopters etc...

At that price there is very little chance it will be 10000mAh either.  Save yourself the trouble and get a good sealed lead acid.

http://www.ebay.co.uk/itm/Yuasa-NP7-12-12V-7Ah-General-Purpose-VRLA-Lead-Acid-Rechargeable-Battery-/111936084328?hash=item1a0fe91968:g:bCAAAOSwFdtXzZDw

That looks quite reasonably priced.

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Yes, you have to be very careful with LiPos!  Good/safe ones are very expensive and need a special charger as John said.  They are very prone to catch fire and the recommendation is that they are charged in a special flame proof bag and not in the equipment.  Many serious fires have been caused by LiPo batteries.  Best avoided IMO.  Lithium Ion batteries are alright.

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Thanks for your quick replies. No D4N no info on how many amps rated at and no mention of current protection.

I think it would be wise not to buy this battery and as John says go for the more reliable & tested  Yuasa battery . It did seem too good to be true and as you say little chance of being 10000Ah at the price.

I am like most people a bit wary of things made in China and we cannot get away from it. But in reality  a lot of  goods are made in China including astronomy stuff. A lot of goods are made ok but you sometimes get the  outright dangerous stuff made and surprisingly let through to UK. I once purchased a torpedo switch for a bedside lamp from Wilko. It was not till I opened it up to wire I saw how bad it was. It is standard to connect wires in the connector with a screw. This one had no screws at all but wires went under a sort of spring clip and a good tug pulled them out,that went into the bin.

Samsung are not saying where their fated Note 7 batteries are made,China or N. Korea. Wonder where the batteries on planes that catch fire are made?? And of course hoverboards etc??

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I agree with Gina, you generally get what you pay for with high power batteries although some savings can be made.

Alan 

P.S. Fire can be the least of your problems I have seen a small PP3 sized one of military grade with a faulty charger take a piece of kit 30 foot into the air and bend an RSJ.

 

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I bought one of these a while back from ebay: Battery

Smaller then the one (capacity) you are looking at, not sure if they do greater then 8000. Might do or they might have done. Came with the charger/plug, although I did say UK but ended up with EU. Battery take a while to charge, gets to about 11.8v then takes a couple of hours to make it over the 12v mark. Mine was from the supplier in the link.

Runs what I want - either one of 2 small goto's at a max of 1amp (slewing) and 12v - and so far been good. Had to make a small converter to go from the DC connector it has to the size I need.

On the safety/sensible side I would not leave it charging and go out, equally I have a Tracer and I would not leave that charging and go out either.

Will also say that as astronomers we seem to find something that looks right but is not specifically for the job we tend to put them to. Although a battery these are for ccd cameras, not dew heaters that will I suspect draw a heavier current for a shorter time. It may be intended and designed to run a ccd camera at say 1 amp for 8 hours not a dew heater at 8 amps for 1 hour.

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I'm using one of these for my portable setup:

 https://www.amazon.co.uk/EasyAcc-Monster-26000mAh-External-Portable/dp/B016DA61V2/ref=sr_1_1?ie=UTF8&qid=1473531138&sr=8-1&keywords=26000mah+power+bank

Since that is 26000mAh at the 3.7V of the cells it works out at 96.2Wh (note that a lot of advertised mAh ratings for batteries are misleading as they may not be at the output voltage).  I use this for running the cooler I made for my ASI178mc, my RPi (which in turn is powering the camera) and my home made 5V dew heater.  I can also power my Star adventurer from it although I generally just use the AA batteries for that.  I've had it on for four hours and it still showed >50% remaining.

It has dual charging inputs which means it charges much faster than most 5V power banks.

 

And it has a torch, clearly designed for use at night :D

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I am a huge fan of Lithium Polymer batteries - but not for astronomy!!

My other hobby is building and flying model aircraft and when I need to pull 120 amps for a few minutes there is nothing to touch Lipo batteries.

BUT - as has already been said - you need a specialised balance charger that monitors each cell individually and charges appropriately and most importantly turns itself off at the correct point. Even the very cheapest Chinese version of these chargers runs at over £40 and a decent make like Hyperion are well into the hundreds.

I wont go into the detail but Lipo's are very specialised and need careful handling to avoid a very nasty explosion/fire.

For astronomy we dont need massive power for short bursts - we need low power for an extended period and to achieve that nothing IMHO comes close to the humble 12v lead acid battery.

For lower power rigs a burglar alarm back up battery like this is great - https://www.firedetectionshop.co.uk/fire-alarm-accessories/fire-alarm-batteries/yuasa-np7-12-12v-7ah-sealed-lead-acid-battery/?gclid=CKCmxcnChc8CFQcz0wodIjoE1Q

For higher power rigs a caravan/boat/golf cart/leisure battery is perfect - they are easy to look after, easy to charge, not inclined to explode and are cheap - http://www.countybattery.co.uk/caravan-boat/110ah-leisure-battery-enforcer-leisure-caravan-110r-web-only/?gclid=CKyzluLChc8CFfAV0wodtjMP1g

Hope that helps !!!

PS  I would never buy a Lipo from eBay etc

 

 

 

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  • 5 months later...

old thread

There are some Li-po power banks from TS on the market:

10Ah

http://www.teleskop-express.de/shop/product_info.php/language/en/info/p5991

20Ah

http://www.teleskop-express.de/shop/product_info.php/language/en/info/p6869

and 45Ah

http://www.teleskop-express.de/shop/product_info.php/language/en/info/p8997

Also Celestron offers lithium power bank:

https://www.bhphotovideo.com/c/product/1217065-REG/celestron_18771_powertank_lithium.html

 

I'm looking for one myself as I need to be independent on mains power from time to time. Lead acid batteries aren't good choice for travelling  due to excessive weight and I guess it's excluded from air transport. Lithium batteries are allowed in carry-on luggage.

The only doubt I have is about charging options. Is mains adapter only stupid AC/DC regulator or actual charger? It would be nice to have an adapter for charging it in the car from 12V socket (and boost it to 19V charging voltage). Confusing is also 6h charging time - works fine with 10Ah bank but my math fails with higher capacity versions (capacity 20Ah@12V = 240Wh, charger 19V@1.2A*6hours =136Wh).

 

 

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On 10/09/2016 at 17:55, trogre said:

Hi All. Just looking for advice on a 12v 10000Ah lithium battery for sale on ebay uk. I did notice that on ebay.com (USA) they have the same battery for sale. The one I am looking at is available in the UK but the rest come from either China, Hong Kong or Guernsey.

 

I have no experience in lithium batteries and to me it does seem cheap @ £20.78 inc p.p, Ebay UK No 152224745914            
The same batteries (and photos) on sale on ebay.com are between $22-25 inc p.p, Ebay.com No 182063039389 .

 

It could well be that 12v lithium batteries are coming down in price anyway. The things that puts me off is the description on the ebay seller has the charger included but seller then states the charger is not included which means another £10 on top of that price. Another thing is the seller has 209 negative feedbacks for one month!! Not good!!

 

The specs if you do not have a look are:-

 

DC 12V 10000mAh Rechargeable Protable Li-ion Battery Lithium-ion+UK Plug Charger

 

Specifications:
input voltage: 12.6 VCD
output voltage:12.6-10.8 VCD 10000mAh
Capacity: 10000mAh
Charger AdapterUK


Package Included:
1 X Lithium-ion battery
1x Charger Adapter !!!!!!!!!!!????????

 

I will hoping if this is ok to power a dew heater strap & controller for a 8” sct for about 2 hours. If power is not enough and the item seems too cheap for what it is I will give it a miss.

 

Thanks for any input.

 

P.S No idea why some type is highlighted in a white box,sorry

Avoid this battery. It will not be 10000mah. A good lipo of that size will cost you well in the region of £100-£150. General rule of thumb is expect to pay £10 for every Amp with these batteries. They are a lot cheaper than they were 5 years ago, as demand has increased as the model flying market had a big boom (no pun ntended). The charger will not be any good either, unless it is a balance charger in order to get the 3 cells perfectly balanced at around 4.2v per cell, otherwise a cell will blow and you cannot stop it. I use Lipo's for my large RC planes, and the chargers are expensive for a good safe brand. 

Stick with a deep cycle SLA battery like used in mobility scooters and kiddie carts. You can get a 10 amp off ebay for around £25 delivered. They are designed for long slow current draw, unlike a car battery. Do not go for the alarm or PSU style back-up batteries as they will not tolerate constant repeated slow draw. I use a 9 amp one for long fishing sessions to power an LED strip light, and charge my tablet and phone. After 48 hrs usage it has gone down by around 1 - 1.5v from 13v. Been using mine for around 3 years now. 

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