double cell or single cell

[DeeChan]

when people do the double cell mod, isn't it just combining 2 1.2 v batteries? why not use 1 2.4 volt battery? would it work or would the cell size be too big?

[Namuna]

when people do the double cell mod, isn't it just combining 2 1.2 v batteries?

- Yes

why not use 1 2.4 volt battery?

- Because there are no such things as 1/3AAA size, 2.4v batteries

would it work or would the cell size be too big?

- You're probably thinking of the bigger size batteries and yes, they'd be too big to fit inside the PCB.

[Kaizer-Stryke]

theres gotta be a nother way to get the same effect of the dual cell mod without using 2 cells theres just gotta!! until someone comes up with a way ill keep messing up batteries trying to do the mod.

[epilot]

Lets not confuse terms. A battery can be any number of cells. Therefore there is such a thing as a 2.4 volt battery but it would still consist of 2 cells. Rechargable cells whether they be NiMH or NiCd are nominally 1.2 volts pr. cell. Any increase in voltage would require more cells.

Moving onto different chemistries, we have the non-rechargeable Lithium cells (like the CR2 used in cameras) that have a nominal voltage of 3 volts.

Last we have Lithium Ion or Lithium Polymer cells with a nominal voltage of 3.7 volts pr. cells. These can be recharged and have a very high energy density. There are 145mah Li-Poly cells available the will fit on top of the PCB in many Bits - depends a bit on the body shell. The downside is that you need special chargers to charge Li-Poly cells and they must not be drained below 3 volts as this will ruin them. I use these cells a lot in my indoor R/C planes - all in the sub-ounce category.

Conclusion: If you want more power there is no way around adding cells. We can just hope that smaller cells with large capacity show up so can more easily fit extra cells.

A word of warning: More than 4 cells (max 5 volts) can damage the receiver!

Hope this helps

Michael

[Kaizer-Stryke]

wow thats alot to take in, but its nice that u mentioned a limit i always wondered if there was one.

[bitbeater]

Try using some 'flux' when soldering the batteries. It will help alot.

[bitbeater]

Some cars have alot more room then others.These are 250mah 1/3 AA cells..

[bitbeater]

[bitbeater]

[Kaizer-Stryke]

whats flux?

[bitbeater]

Its like grease that will make the solder stick alot faster.