As they say buy the best, I have fished the ameture side of many pro walleye tourneys and some run Relion 12 volt 100 AH Lithium life PO4 which is safest of the technologies, half the weight, charge in 2 hours. Lithium's do not loose voltage, provides twice as long of a charge. Only $1,200 x 3 for 36 volts complete setup with charger north of $4,000 easy what the heck impress all your buddies. Great read if you what to look it up. Wife would kill me so I run cheaper Lithium do like them will never go back to acid shit.