A123 Worlds Smallest VS. “Strongest” 12V Jumpstart battery
In this video i finally decided to show you how IMPRESSIVE are these A123 cells. During the test, when the starter ran for about 2-3sec, the current reached 230A. The GM volt wanted to use the same A123 brand and chemistry of these cells. I never saw any smaller booster pack than this one that i built.. even though i searched on the www or in any stores.. so i believe that this is probably the most compact and powerfull boostpack in the world… They dont need to be plugged like 10 or 15 minutes like many “booster” conected to lighter plug…. This one can quick boost in less than 30sec.. just the time to connect it.. no need to wait! For those who ask about battery mixing.. there is no problem.. their charge voltage is 14.4V (3.6V/cells) and this is the same common voltage of any alternator charging voltage. their charge and discharge profile (graph curve) one of the most similar than SLA (lead acid)… Nicad or NiMh can not do that… they can explode… the A123 can not explode.. just search about: “A123 Nail test” on youtube you will see… they are SAFE battery.. no toxic.. no fire… In this voideo i’m not trying to sale them.. I repeat: I just want to show people that the NEW Lithium battery are far away from the last that explode (Sony lithium cobalt.. like on the laptop or cellphone..) Like for the SAFT battery, the army is using them too. I know these A123 cells perfectly cause i tested them and i know every of their caracteristics. Just ask.. that will be a …
Tags: A123, Battery, Jumpstart, smallest, Strongest, World's
are you crazy do you wanna blow up your car
-21C?!?! Damn… I hope you use a good synthetic oil.
What if I used these cells to repack my laptop battery? My stock 6-cell battery is crapping out, and it would be nice to have three of these in my laptop.
Would it work as a direct replacement to 3.7V Li-Ion cells? I’m aware of the lesser voltage…
very interesting video! thanks!
That’s what i call power
It’s really not ANY 12V battery that can start a car. (BTW All battery are DC…)
It depend on the current capability of that battery.. Power is Voltage time current.. and to start a gas engine you need BOTH.
These cels can produce easy 120A during 10 second and near double during 2-3 sec… not a Makita cordless drill battery!.. The Makita LIthium are using the Sony Lithium manganese 18650V and VT) and they are capable of 30 or 40A max for the bigger pack ( BL1830)
that totally works ,, any 12volt battery will start a car
I once used a 12volt mikita cordless drill battery
and item your using puts out 12volts in DC form
no.. it’s not a booster.. The Oem car battery is 11 years old and is pretty dead. it is more like a load than a battery.. so the pack i built is also putting some current to the dead battery and to the starter. I also tried to discunnect the OEM 12V battery ad the little pack work better WITHOUT the car 12V battery.
It is a little bit tricky. you just use the small battery as a BOOSTER. may be other kind battery can do the same.
@Doctorbass
that is still pretty good 1000 cycles of charging and discharging at 10A in 15 mins vs 300 cycles of a lead acid battery at normal charging rate. the lithium has about 3X more cycle life over the lead acid battery. They need to make Jumpstart boxes that use lithium batteries. you may have something going here. if the right company sees this video you may get rich off this idea. so keep this rig. this may replace lead acid batteries but it may be a bit more expensive.
A Lead acid battery usually have 200-300 complete cycles. a lithium like mine is 2000cycles. Abot the 20A i meant under 20A discharge rate, you can do 2000cycles without loosing 20% of total capacity. The 2.3Ah cells inside can be charge at 10A that mean in 15 minutes they are FULL. but the cycle life is reduced a bit.. like 1000cycles
@Doctorbass
I wouldnt be surprised if they start using this tecnology in jumpstarters now, since litium cell batteries are much better than the older lead acid batteries. how many times can you charge a lead acid battery before it starts to deteriorate? maybe 500 times under normal use. is the current under 20A considered normal charging? how long does it take to charge at this rate?
@coondogtheman1234 ,
Yes it is RECHARGEABLE.. at this rate you can recahrge it around 200-300 times.. but normally with current under 20A you can recahrge it for 2000 times.
It’s the best stable and powerfull LIthium cell generation.
Is this little rig you made is it rechargeable like can you use it again and again?
How long have you had your K2′s. They changed some of their chemistry. On their 26650P rating is <9mOhm. You can short pulse that cell at up to 150A and continuous @ 42A. It’s only a 2.6Ah but if you want power that’s a great cell. Their 2660EV is rated at <19mOhm but is 3.2Ah.
Yes these K2 qare great.. But i preffer the A123 for the same price! I actually have the K2 and they are heavier.. their energy density is lower and their measured DC internal resistance is around 25miliohm and the A123 are 10 miliohm… so for the same current the A123 produce less than half the heat! The A123 are now availlable at 5-7$ on ebay…
I’m a fan of the K2 LiFePO4 batteries. You can purchase directly from their website. Because they make both a power version and an energy version, you have a choice as to more power or more energy.
…continiung
the diode rest , voltage to the adaptator exit and the batteries reach only 11.4 volts
11.4/3=3.8 absolutly right, if they were equilibrated in the begining!!!!!!
total amount
1_adaptator 10 euros =16 dollards
1 or 4 diodes 1 dollard
conectios
sorry my english im fron spain!!!!
good video Doctor, I use 3s1p for my rc brushless cars and the best way and cheap to charge 3a123 is
1_adaptator 220V-110V to 12.3v
12.3 because is tipical diode zener
and between the 3a123 and the charger, i put some diodes in parallel or one that admits 2-3-4 ampers (or so mani from 1 amper in parallel)
the circuit wol be:
adaptator altern current to 12.3 V
normal diode that admiit the amperage charging
the 3A123 batteries
continue…….
@wordreet
can be charged in Li-Ion mode, but only at ~2,3A and with reduced lifetime
Thanx for the reply.
Canada is cool.
Frozen actually!
Yes
Excellent! 5/5
Am I correct to say that these can be charged using the Li-Ion setting on a programable R/C model charger?
But everybody, do yourself a favour and buy a charger that stops charging when cells are full, its not that expensive and saving a few bucks is not worth killing the cells.
But, hey, the first test had to be done, and now its done !
And yes, it can be done with a car charger but no, it can not be recommended, only if you stay at place all the time and have an eye.
All right dudes, i did it !
I tested charging my 2S A123 with my car lead acid charger in 6v mode.
It works, but you have to be very careful, because it dosnt stop loading when cells reach 3,7V/cell.
I took mine away from the charger when the charge current dropped to about 0,5 Amp.
That was too late, cells had 4,2 Volt at this point, so much too high.
When i stop charging while charge current is at about 1 Amp, than the cells are at about 3,6 to 3,7 Volts, so thats the ideal for them.