Re: Beware survival bias
waiting hours for one or more battery recharges
What is the fad these days for selling you one battery and multiple battery-less tools? Several (DIY-oriented) manufacturers are touting these "systems". Buy your first tool which comes with a battery and a charger (occasionally two batteries), but save money by buying subsequent tools without the batteries.
Waste time on the job a: constantly swapping batteries b: not being able to have two people using tools at the same time c: waiting to recharge.
Here's an example. Six tools, three batteries and a single charging unit that takes over an hour to charge a battery.
To be fair, other packs come with better ratios or better chargers and as it's possible to buy batteries and chargers individually (until they change the design) it's certainly a flexible system, but the thinking behind the "multi packs" doesn't stack up, except for the lone DIY-er with plenty of time on his/her hands.
M.