I highly recommend using guides for this. I have not personally done anything with the electrical nerf mods, but I have worked with the batteries that are often used. Because of the power that RC batteries put out (current and voltage) and how much more energy they can store up than normal batteries makes them rather dangerous.

be careful not to let leads touch, even on a discharged battery. some of the batteries can be considered explosive, this is mostly targeted at the Lithium-Polymer type (Li-Po), but I'm not entirely sure if people are using that kind of RC battery. Regardless, Lithium batteries should be monitored when charged. if they start to swell for any reason, remove the power source and contain it some how, a coffee can, pan anything. It's not a common occurrence, but should you be unfortunate enough, they go off like incendiary grenades.

Also, when "over volting" the motors you have a chance of ruining them. The motors in the Rayven already have the stock battery current reduced by resistors. Adding more voltage will make them spin faster as desired, but if they go to fast they will burn themselves out. Some mods also ask you to take out the resistors completely and never replace them with anything. That's also risky for similar reasons. The resistors, while limiting energy a bit, are there to protect the motors. if they're gone and something shorts, a switch goes bad, etc. your protection system is gone, and sad motor is sad :\

that's not supposed to scare you, but inform you. I'd love to do an electrical nerf mod, I just don't have the money for the blaster or the parts.

Basically what it amounts to, is do your homework and be safe. The best performance stuff I've heard of is to get better motors that are meant to take the higher volts and current. you can also get and use the more powerful RC batteries, just know that "new rules" apply for safety with some of them. Also check your math. one of the hardest parts about work like this is just that there are a lot of numbers. Make sure you know these terms: resistance, voltage, amperes, Amp-hours, and Ohms Law. Knowing that will allow you to understand the math behind everything and make sure what you buy and use wont blow anything up, or be too weak.

In regards to the batteries. The flash batteries might help, it depends on the over all voltage you can get out of them, and if that total is higher than the stock battery total voltage. They should be marked in volts, just see how many it takes to get the voltage you want. They may not last as long as you'd like them to though. That would depend on their Amp-hours, which should also be marked.

As alluded to above, the higher voltage is what you want. You'll have to be careful of the current that creates however, too high of a current will destroy your motors, or wires, or something else. Capacity for batteries is measured in Amp-hours. The way you read that is to take your load's current (read as "how many amps do my motors pull") and divide the amp-hour value by that number. That will give you how many hours (more likely to be minutes) your battery will last. Also note that most batteries mark this figure in milliAmp-hours (mAh), so remember to convert the units.

I apologize for the small book I just presented to you, I apologize even more if you knew that stuff already. But I hope that at least some of it helps you out.

one last thing. towerhobbies.com is a great place to go for RC related stuff, they have more batteries than most of us can imagine. That link should take you right to a search for all their batteries. you can slim it down to what you're looking for.

happy modding!. and don't piss off the cats /too/ much. They are vengeful critters when we least expect it! XD