Looking for a 7.4v 5000mah battery help

[Gamerlolwind]

Hay everyone
I have some trouble with batteryspace on getting a battery pack i want as they don't ship non UN approved batteries to Europe.

I found a UN approved 7.4v 5000mah but it has no PCB which is dangerous I don't feel safe with a non pcb battery pack.

Also how much playtime (hours) would this UN approved battery give me?

http://www.batteryspace.com/li-ion18650 ... ionic.aspx

If not 2 or 3 hours then where and what battery of 7.4v should I get?

Not from ebay, I assume?

 

[Prog]

Not that many. It only has 2600 mAh, and it looks pretty Dang big for that.
You can get a separate PCB and smart charger, connecting the PCB like this (credit to Hailraizer):

 

[Gamerlolwind]

Not that many. It only has 2600 mAh, and it looks pretty Dang big for that.
You can get a separate PCB and smart charger, connecting the PCB like this (credit to Hailraizer):

yeah, the 7.4v setup (7.4v charger/pcb 3.7v at 5000mah x2)

using these UN approved packs:

Polymer Li-Ion Cell: 3.7V 5000 mAh (896474-2C, 18.5Wh, 10A rate), UL listed/UN Approved (NDGR)

http://www.batteryspace.com/polymerli-i ... isted.aspx

im thinking this may be the perfect battery solution for me, as these will defiantly ship to europe.

only, i can wires these together myself as i may mess it up and damage the batteries .

is it possible for someone to DIY this setup for me and then ship it to me?

or is that too dangerous for safety or for the battery's safety not to explode?

 

[CentiZen]

Are you pretty set on only using prismatic cells in your project or would you be willing to design around cylindrical cells as well?

The reason I ask is that the 18650 size Li-Ion battery has pretty much the highest power density of any reasonably sized cell on the market, with Panasonic making a cell that packs 3400 mAh into a package a little bit larger than a AA battery. These are 3.7 volt batteries, so you would need four of them in all to provide 6800mah at 7.4 volts, but

I use these cells in several custom packs I make for various devices, and if you wanted I could do this pack as well; but I would a while in lead time to get the specific protection circuits you would need.