I was looking for cordless water transfer pump because I have a garage without mains water, so I’ve installed water tank and now had to fill it in somehow. So my choice was to periodically bring in small water canisters and transfer it to bigger tank using transfer pump. All cordless pumps I’ve looked at were a bit pricey, until I came across this Sun Joe Water Transfer Pump. Because I already own another cordless Sun Joe products I’ve decided to order this pump despite not very good review rating, and it’s a great pump. I have few 2.4AH batteries, and they last good amount of time. It says that pump doesn’t have to be primed, but I would advise to fill its nozzles with water, it helps pump to have a smoother start, especially when it is little stuck after last use. It comes with oil, which you need to put (3 drops) into nozzle before and after use, in my opinion it doesn’t really help, but I still do it just in case, I might be wrong, maybe it helps. Amount of oil it comes with is small, so I will be looking for pump oil soon, and if you are buying this pump, order some spare pump oil in advance, if you are planning to use it more than once a week. For the price, build quality is acceptable. I would definitely recommend it to those who are looking for water transfer pump at affordable price, even with battery set it is cheaper than competitors (excluding no-name stuff which is always kind of a lottery, it might be good, but more often its bad).Was looking at other tools that used the same battery as my mower and found this pump. It works very well for watering the plants from our rain barrels. Very nice solution.ABSOLUTE CRAP. I GOT THREE IN RETURNS AND THE PUMP MOTOR DID NOT TURN IN ANY. Battery worked well, light came on, pump squealed and made an odor as if it was trying to burn out.Cannot even give one star. Nothing like the videos. Could get no help from Sun Joe except two returns that also failed.Installed fully-charged battery. Would not start, let alone pump. Locck-up inside, apparently. Light comes on, then goes off. Burning smell! Returning.Defective.!!I got this pump for closing up my pool in the fall. I use it, in conjunction with other methods, to lower my water level. I love the fact that it's completely portable. The battery lasts 45mins to an hour, which isn't great for my use, but it does recharge fairly quickly. I would recommend getting an additional battery if you plan on using this to move a lot of water. For smaller jobs, this pump is perfect! I'd definitely recommend it.