Have taken the plunge and bought one of these, anyone else had any experience with them? Nice an compact, the specs are good. 

https://www.batterysmith.com/products/7000mah-electric-reel-battery-kit?st&utm_medium=paid&utm_source=fb&utm_id=120202114196600349&utm_content=120212149292740349&utm_term=120212149292710349&utm_campaign=120202114196600349&fbclid=IwY2xjawGKULpleHRuA2FlbQEwAAEdX4g_SP2Tk29P7_EVU0f_-QgRNhcLFMry3SwU0U4fi0YGohOEluGlYfSN_aem_KyRBdcHXNzSgfTXWlYF5gw