For people just getting into electrics.. I would offer a little advice.</p>

Try to "standardize" on battery sizes/shapes/capacities. Why? So you can move/use your batteries in multiple planes, thus spreading your battery costs.</p>

For example, I'm mostly standardized on ThunderPower Pro-Lite 4200 mAh battery packs. I get them in both 2S2P and 3S2P set ups. I started to really hate Dean's connectors, and converted all my batteries over to 4mm bullet connectors. On all batteries, I was consistent, one male connector on the positve, and one female connector on the negative battery leads. Then I wired up the ESCs just the opposite.</p>

Why do I do this? The bullet connectors allow me to connect the batteries in series without extra connectors/adapters. I can now assemble 2S, 3S, 4S, 5S and 6S battery setups with two battery packs. Just hook 'em up.</p>

The bullet connectors also allow me to add in an arming switch really easily. If I desire. I actually find the bullet connector easier to plug in/pull apart compared to the Dean's.</p>

Like I said spreading the battery costs across multiple planes is the biggest benefit. My LT40 uses a 2S and a 3S pack in series. My US 60 uses two 3S packs. My next plane may need a 4S. All possible with the same batteries.</p>

Also, as time goes by, you can add batteries to your inventory one-by-one. If you're ordering stuff on-line, and you need to spend a little extra to get free shipping, or some sort of discount.. add another battery to the order. You'll use it eventually...</p>

Personally, I see the magic cost cut-off at about .60 size aircraft. If you already have a good collection of batteries, .60 sized airplanes aren't to expensive to electrify. But if you're just starting?the upfront cost can be pretty intimidating. If you're just starting out, I'd say the line might be at the .40 size.

Electric really has a benefit (and costs) when it you start getting into multi-engine birds.. But that's another story/thread/post/argument.... :-)</p>

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