Would an opportunity charger address your needs. We were told that it reduces the need for watering and washing the battery as the temperatures don't get as hot. Info that I found doesn't support the salespersons pitch that this charger significantly reduces battery maintenance and is practical for a 1 shift operation. We are currently shopping for a 3 wheel electric forklift. We are concerned with battery maintenance for a 1 forklift operation. Hangcha recently came out with a 3 wheel Electric Forklift with Lithium-ion battery that doesn't require maintenance and may address your needs for a 2 shift operation. Spending a lot of time investigating and looking for info about this product.