ZIPPY Flightmax 8400mAh 2S2P 30C LiFePo4 Pack

 Jcote 11 points

First, use a charger that will charge LIPO batteries, second, try to use a charger that will balance charge while charging as these are two cell batteries. I use a Thunder AC6 charger, which allows me to balance charge and charge at the same time. The only problem is that the battery says not to charge more than a max of 4.5 amps so it takes a while to fill these babies up. The Thunder AC6 charger charges at a max of 5 amps and that's what I charge the batteries at. Wish I could charge at 8 amps at these are 8000mah (Milliamps). You usually want to try to charge at 1C per thousand milliamp.

 mattio79 120 points

ignore the idiot above me. use a charger that charges LiFePO4 batteries. if you use a lipo setting, you will destroy this battery. lipo max charge is 4.2v/cell. life is 3.6v/cell. most of the current, modern chargers can handle life batteries or they wouldn't sell. life is the safest chemistry available. it may not be the most dense, for which you would need to purchase Turnigy nanotechs for, but it is leaps and bounds above SLA (lead-acid), for which they were intended to replace. the max charge voltage for 6-cell SLA is 14.4v. the max charge voltage for 4s life is the same, 14.4v. coincidence? i think not. by the way, this 8.4AH battery can be safely charged at 16.8A.

 Jcote 11 points

Excuse the douche bag above me, that was suposed to be posed under the 8000 lipos as I was looking at both of them and accidently put it under lifepo4. Not an idiot, just a simple mistake. The guy above me clearly shows that his dad touched him at night.

 mattio79 120 points

i apologize for the initial remark. it was very late and i was in a foul mood.

 olman 16 points

These should be okay but you need to see what the ESC is capable of handling in the way of voltage. You say your motor is rated at 14.4 Volts. What is the ESC rated at?

 Jcote 11 points

ESC is rated at 16.8 volts, I'm running two low voltage alarms an they run nice with my stock titan motors. Will be upgrading to the dewalt motors as soon as I fix the bulkheads that broke the other day.

 mattio79 120 points

should just upgrade to brushless. and do it fast, the prices of neodymium are skyrocketing because china is now the only place where neodymium is available.

 Jcote 11 points

good call, any recommendations for brushless motor/esc set up?

 mattio79 120 points

the 1/8th scale setup from here isn't too powerful, so your emaxx should stay together better. i know, i had one (3905) with a Castle MMM setup and it made it break a lot. keep it with 4s lipo. get the programming card as well. (trackstar 150A ESC, trackstar 1/8 motor and the programming card and 2x 2s 5000mah hardcase turnigy lipos) the LVCs will no longer be needed. those were only necessary with your evx esc. i would also get a receiver pack ( yes, i know, one more battery to charge!) because the dual servos on that truck take a LOT of amperage that seem to blow BECs in ESCs. you might also want to upgrade your bulkheads to FastlaneMachine's combo bulks available on their website. they are a drop-in replacement for the bulkheads, the diff cases and the alignment rings that always break on that truck. let that be the extent of your aluminum upgrades. the rest can be RPM. i sold my emaxx before those upgrades were available, or i would have kept it and gotten them. if you want further help i will help you.

 Guys2nv 15 points

Charge rate has nothing to do w/ the discharge rate of a battery-2 different things. A 2c charge for this battery would equal 16.8A, Gonna need some expensive gear to charge at that Amp.

 eilsel 8 points

the expense of the charge gear is not the point. because the energy density compared to lipo's is less, one of the offsetting factors is high discharge, and high charge rates for turn around speed. note A123's and even the Turnigy lifepo4's charge rates

 Narkoman14 1 points

2c means you can charge with 2 times the batteries MaH rating. 8400MaH can be charged with 16,8 V

 Sascha 5 points

are you serious *-) You mean 2 times the Batteries capacity is 16,8 A, not Volt, this is n fault xD

 beezlebub 226 points

google translator, right?

 Bobhasgas 3 points

Tras vue 3000mah wit sausage.

 mattio79 120 points

le poids d'une pile est toujours dé*terminer le coû*t d'expé*dition. le plus lourd, le plus cher.

 Neptronix 24 points

li-ion is a blanket term for lithium batteries. When someone is talking about li-ion, they are usually talking about lifepo4, or some other chemistry other than lipo.

 Ixtocaltro 38 points

Thanks David, but the main difference is that lifepo4 is Li-ion, and lipo is Li-polymer. They are very different. Do you agree with me?

 Neptronix 24 points

Yes. You understand the difference, but many don't. lithium-ion and lithium-polymer refer to the electrolyte substance. It says nothing about the cathode/anode material, what voltage the cells run at, and how they behave when abused. Although all current lithium polymer chemistries act the same: kaboom or puff if you charge them after being drained very badly, or otherwise abused. As for this lifepo4, it is extremely safe, with a long life, though it has low energy density for it's weight ( mainly due to simply running at a lower voltage. )

 Ixtocaltro 38 points

Thanks for your comments, David.

 mattio79 120 points

when someone says Li-Ion, they are referring to LiMnO. that is the original chemistry of lithium rechargeable batteries. then LiCoO came out. a little better power handling, but more dangerous. then they started hybridizing by using LiCoMnO. better still safety, but still a little dangerous. All LiPo are LiCoO. the insulating layer is polymer instead of spacing and it is made in a more customizable format. LiFePO4 is the safest rechargeable battery chemistry available. Lead acid is heavy, leaks Sulfuric Acid and produces Hydrogen gas (explosive) when overcharged. NiCd will explode violently if overcharged. NimH (nickel metal hydride, nickel hydrogen, etc) will also explode violently if overcharged, but are more environmentally friendly. NiZn are unknown to me as of yet, but have similar voltage to alkaline when fully charged. LiFePO4 can be actively abused and not react badly, other than to vent. they can be set on fire, and won't support a flame. the nominal voltage of the battery techs is as follows: SLA (lead acid) 2.0v/cell Nicd/nimh 1.2v/cell NiZn 1.5v/cell LiCoO (lipo, Li-ion) 3.7v/cell LiMnO (old li-ion) 3.6v/cell LiFePO4 3.3v/cell

 adam74 26 points

This should be awesome!! Can't wait to try one

 Neptronix 24 points

Safe chemistry ( no fires, and you can probably recover from low volt conditions ), much longer life cycle, but lower voltage so you need more cells for the same power. Looks like a good deal, i hope they make a 5s-6s pack. Maybe some 15-20c versions would be cheaper too ?

 Sailingman 6 points

Well i just bought one for a replacement battery on a hi powerd search light the OEM battery was a sealed lead acid 6V/6A so the voltage should be close enough and it's 8.4 amps opposed to 6 amps of the origional and therefore last longer as well,this kind of unit is something that sits around much of the time so i figure at storage charge it should be around 6 amps capacity as the origional and this chemistry seems to tolerate this sitting around abuse until charged well even holding it's capacity with very little drain we shall see sounds too good to be true.