Tiny motorcycle battery (how to build an A123 pack)

[flyboyy]

Thumps up for Great video... I have a few questions for you tho, how does these battery hold up in extreme weathers ? like 20 degrees ? or 100+ degrees ?

what is the life of these batteries before we have to throw them out ? and can we use a battery tender to recharge it when battery is discharged ?

[elpidiovaldez4ever]

how do you balance the battery?

[MaxSachs]

One point I forgot to make: be careful to not solder over the vent holes on A123's when tinning the cells. The video quality is stuck at 480p and I can't see it that clearly but it does appear that the cell vents have been covered with solder, a bad situation should the cells need to vent...

[av8or233]

@MaxSachs I've read conflicting data on those holes. Some say it's ok, others warn vehemently not to cover them. Since they are clearly there for a reason, I was careful to avoid them.

[MaxSachs]

Thanks for posting. 

[NeonGenesisX]

dude great work i learned alot from this video. now im gonna make one my self for my bike ..keep it up

[maakjar]

I can't find a balancing wiring lead diagram for this pack. Do you know how I can wire it or do you have a link?

[maakjar]

Great video really helped me. Thanks

[pornsterwoot]

This is just dangerous. The batteries could explode if they get too hot from the soldering. And it will be extremely hard to solder something on to them.

[Brian500R]

@pornsterwoot

what are you fucking retarded?

[proaudiohd]

Not watching your commercial.

[av8or233]

@proaudiohd It was a DIY project. I am not affiliated with any corporate entity. In fact, I had a hard time sourcing the materials to make this happen.

[proaudiohd]

@av8or233 - I mean the commercial that you have playing in front of the video.

[av8or233]

@proaudiohd Then skip the ad. It won't hurt my feelings in the least...

[michiganfan51]

These batteries are super strong for some reason

[pantera5511]

where did you solder the black cable?

[xamboozi]

I made one of these. DO NOT USE A SMALL SOLDERING IRON! IT will heat up the cells which will damage them. I actually used a butane torch which worked much better to solder with. I don't think thats the best method, but it did work.

[ihatefuckinglogins]

I made myself a 4 cell pack for my R6 and it works great. Huge weight savings.

[tyeealpha]

Reading these four month old comments, I was curious about this "lithium plating".

I came across a blurb on the A123 site that stated these batteries are immune to lithium plating. I think it went on to say that this was because there is no lithium near the anode? Something to that effect, anyway.

I am running one in my race bike and one in my street bike. We shall see. How is yours holding up?

[av8or233]

@ronmann606 Ok, I see what you meant. Yes, I'm counting on the durability and somewhat unique composition of the A123 cells. There are commercial packs intended for automotive use that are, as far as I know, almost identical to what I've built here.

[ronmann606]

Won't they be over charged since there will be current on them even when they are fully charged?

[av8or233]

@ronmann606 Nope. By that logic, any battery attached to the charging system would get overcharged. These batteries are close enough in capacity to the original lead acid battery that they are compatible with the bike's electrical/charging system.

[ronmann606]

@av8or233 No, by my logic sla would be fine but lithium would get over charged. Lithium chargers are constant current sources that turn off when the battery is fully charged, and top them up every week or so if you leave them on the charger. Constantly putting small amounts of current on it when its fully charged will cause plating of the lithium and will ruin most lithium batteries. A123 makes an extremely rugged cell so they might hold up to this.