I have Bowens 500R studio lamp (http://www.bowensdirect.com/gemini500r) It can be powered from a 12V battery (there is a 15 din input at the back of the unit) through a Travel Pack (http://www.bowensdirect.com/travelpak-small-and-bag).
The Travel Pack uses a 12V SLA battery.
I would like to build a custom DIY battery pack that uses a larger capacity battery.
Can I connect the battery directly to the flash? Is there anything 'magic' that the Travel Pack control unit does wrt the current? It has a charge indicator and a slot for a charger, but I don't need them. I can charge the battery using car battery charger.
I saw a lot of DIY battery packs that use an expensive pure sine inverter to convert 12V DC to 220V AC and connect the flash unit using mains cable.
But since the unit has a battery input that I presume accepts 12V is there anything stopping me from connecting the battery directly?