>>2933500
>the Chinese capacitor is 2000V and once again I'd rather try less lethal avenues

2000V means nothing
to cause harm, you need something that'll deliver large amounts of energy, which batteries dont have
think back to when you read news about someone being harmed by a fly-swatter

anyway, if noise scares them away, you can get security cams for around $30 with alarms that sound when movement detected