Headway 38120 HP 200 Amp LifePO4 Cells Can They Start A Cold Car? Follow Up Questions and Answers

Consider these as an alternative:
Took a less than week to get the pack Pennsylvania to Texas
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Last update 01/18/19
Headway 38120 HP 200 Amp LifePO4 Cells Can They Start A Cold Car? Follow Up Questions and Answers
Last update 01/08/19
I state in the video that it was 1200mAh over in charge capacity but that was a typo it actually was 120mAh over in charge capacity. Thank you to foxabilo for pointing it out to me.

BMS Type DLX-9013-L10S-13N13-W02

Protected cut off upper 41.9
Protected cut off lower 28.79V

Battery pack is 4.0 AH 20A max Output(theoretical, not tested)

Battery Management System (BMS) is a protection circuit only
NOT a balancing circuit

Specifications For Cells:
Rated power: 2000mAh
Model: LS LR1865LA
Rated voltage: 3.6V / 4.2V
Charging voltage: 4.2 ± 0.05 V
Discharging voltage: 2.75 ± 0.05 V
Standard charging current: 1C
Standard discharge current: 1C
Maximum charging current 1C (T≥10 C)
Maximum discharge current: 10C 20A (t≥0 C)
Recommended temperature: when charging 0 ~ 45 C, with discharge: -20 ~ 60 C
Size: 65.1 x 18.4 mm
Weight: 46 g
Life cycle: after 300 recharges the capacity is retained by more than 75%
License: MSDS 2006/66 / EC UN38.3 UL1642 IEC62133 SDS CE KC CQC BSMI WERCS
Certificates: ROHS / CE / FCC / UL

[MsDiT]

The real question is, can the alternator charge them?

[AlexandreLollini]

My track car use 4 of the blue ones of higher capacity (the 42xxx are 15AH) and it's awesome. You don't need 200A for a small 4 cylinders. I've seen peaks of 50 to 70 A.

[techX]

FYI: Clarification on Cold Start; Engine that hasn't ran for an extended period of time like parked overnight. It refers to engine has ample time to cool down, and oil has settled from cylinder to the pan. Most engine damage occurs during this initial few seconds of "cold start" when lubrication is not sufficient. Some folks here are confusing "cold start" with starting the engine during cold weather. It is similar, but the test here is satisfactory for definition of Cold Start. The engine temperature and ambient air temperature is very close to each other, at or below average air temperature of 72 degree Fahrenheit. So, from what it looks like this was a true "COLD START". Good video.

[peterdkay]

Your charger will charge up to 6 cells in series. For 4 cells all you need is a 5 pin balance connector plugged into side of charger so it can read each cell voltage. When you start select 4S and charging current (2A) before you long press START button. I suggest you only use 2A charging as it may overload charger power supply. (2A x 14V=28Watts).

[Kabab]

Would you happen to have experience with the blue 15AH cells? I don't quite need 200A but if I can get even 8C out of those blue ones it would be fantastic. Thanks.

[jonyjoe]

car starter is insignificant for such powerful batteries... great review.

[gustavoguallar]

Would the alternator charger them? Or damages them? They are sold out, any other place to get them?

[AlexWaardenburg]

Hey, I'm pretty sure that charger can charge all four of those at the same time at 12V (4 in series, AKA 4S).

[richardnanis]

The main problem for use in a car would be the relative low capacity of 8 Ah. My car (Scoda octavia 1, 9 l TDI Diesel) draws 40 mA of standby current just when sitting in the garage. This is for clock and other electronics, maybe also creeping current but seems to be normal on other cars too. This means a loss of 1 Ah per day. So when the car sits still in a garage for one week your battery would be nearly empty or already overdischarged quite a lot.

The other thing is, normally, after starting the car, the lightmachine would charge the battery with a very high current (there is no cc normally!), that can mean it would charge with 30 or 40 amps for a moment. Probably this wouldn't hurt the LiFePo - but not sure here.

[nemanjaveselinovic]

What balancer do i need for 8 of these connected to 12V

[basshead]

Hi man.what is difference between them and 15ah model?

[heartobefelt]

appealing when you consider putting 4 in series times 2 - 3 sets parallel, with BMS of course

[smiththers]

Just ordered 4 of these to build a custom pack for my motorcycle. I may end up ordering more later for my other toys lol

[russlora]

You need about 8 more and connect them in para -series to have a reliable car battery, ,,, with just the 4 you are in the danger range of amps pulled starting the car is going to do . and even more amp pull when its like 20'F outside

[mrpangy]

Nice. I wonder if half of the question of starting the car cold meant having a cold battery... Stick the battery in the refrigerator to bring it's temp down and try starting the car... Then stick the battery in the freezer for a while and repeat... Just an idea you might consider.

[ib]

Can you replace your car/motorcycle battery with these cells?Could you actually keep the cells connected to your car and keep using it everyday?Would the cells need a pcb balancer?

[wolfie]

I am trying to replace the batteries on a 1986 MCI 102-A3 bus. They are two massive 8D 12V Lead Acid batteries. Any direction on doing that and use Lithium instead?

[jcctfjp]

Where do you get the bus bars and cell holders for cells this size?

[eagle]

Can 8 of these cells operate a 24v trolling motor? And charge by solar panels?

[bigkato]

I'm built a 40ah battery using 20 of these cell not sure on how to wire for 40 amp hours also what the best way to bottom balance the cells and what's a good voltage for bottom balancing I'm using them for car audio