Yes, and plenty of owners do. The job is removing the flooded bank, fitting a pack and tray, and swapping the charger. It needs care around cable torque and the controller's voltage window, but it does not need a workshop for most carts.

The pack, a matching lithium charger, usually a tray adapter or replacement, and confirmation that the controller accepts the pack's full-charge voltage. Add a shunt or meter if you want state of charge rather than a voltage reading.

Above roughly 150 rounds a year, usually yes: the pack lasts several times as many cycles, roughly doubles usable capacity for the label, and removes watering labour. Below about 50 rounds a year, the flooded set reaches calendar age before the cycle advantage appears.

Three real ones: higher purchase price, no charging below freezing without a heated pack, and no partial replacement when a single cell group fails the way a 6V block can be swapped. The rest of the commonly cited drawbacks do not apply to a modern pack with a proper BMS.

The ones with the highest stated cycle life at a stated depth of discharge, which usually means LiFePO4 cells of a known grade and a BMS with a real balancing strategy. Warranty length is a weak proxy; the depth-of-discharge figure attached to the cycle claim is the useful one.