Fishman fluence battery packs

[fusionid]

They go in place of a 9 volt battery. They last very long and are rechargable so you won't be polluting as much.
Any chance EBMM may license the tech? Since lots of models need batteries.

https://www.fishman.com/wp-content/uploads/2016/04/whiterechargeablestratbattery_large.jpg