I am about to order 5000 2M strands of micro-diodes - 20 diodes per M - 40 total - and want them to last for the duration of a party - 6 hours - with the capability of on/off/slow twinkle. I have been told that the two coin batteries cartridge - CR2032 - won't last that long - that I will have to go to a 3AA battery cartridge. Seems like overkill to me. I've also considered some of the smaller battery banks (I've purchased 3500mA battery banks at Walmart for less than $5) and wonder if I specify a USB connector to the strands - if this might be a better solution - and it's rechargeable. Any suggestions?