I charge it very rarely, it has a pretty good battery. The power is also very good, to the point that it can make your gums bleed if you use it at full strength. It definitely needs 1-2 refills of water if you are very meticulous, but for me this is not a negative because it stays light and easy to use. For its price, excellent!

When I screw the bottom cap with the water, because the white tube is almost the same length and doesn't sit sideways, it often creates a vacuum at the bottom and the device doesn't dispense water. So I had to use a razor and cut a bit off four triangles at the edge of the tube to prevent it from vacuuming. I am attaching a relevant photo. There is a serious risk of damaging the product or its power supply. Firstly, it does not charge with magnetic induction with its own charger, like most electric toothbrushes do for water protection. In the user manual, in the paragraph about cleaning it, it states not to submerge the device in water, but you can rinse it under running water. I made the mistake of rinsing it under running water without the transparent plastic nozzle for the teeth being on it. Thus, water entered the top hole and I expected it to come out of the bottom white rubber piece. However, the water got trapped in the USB port and when I released the rubber piece that protects the port, a large amount of water came out. If someone blows into the top hole, air comes out normally from the USB port! If the USB port remains wet and we connect the charger, it could burn it out if the charger does not have short-circuit protection. Also, water in the device's electronics means a risk of short-circuiting and leaking battery fluids. I dried the USB port in the sun after I had opened it and blown to remove the water. Then I wrapped the device in an electric heating pad several times to dry it well. Finally, I tested it and fortunately, it worked. The rubber cover of the USB port can open from vibrations and from our hand holding it. However, the device does not break despite the water that may enter. We only give power to wet devices after we have dried them well. Those that have a battery are at risk even without pressing the start button. Water pumps should not operate for many seconds without water, with air, because the water cools them and also reduces the RPM of the motor. The instructions say to change the nozzles every month, but they are not sold separately. I believe a disinfection every now and then is sufficient. It has a total of three inside. The pressure on the third setting is satisfactory, but it does not reach that of the wired Waterpik that I have. When the battery runs out, it stops without any indication. I ultimately give it three stars because I managed to make it work normally by cutting the white tube. Otherwise, the device would have been useless to me

It is like the photo and it does its job well. You need to refill it several times, but anyway you will be over the sink so it doesn't create an issue. Its battery lasts 1 to 2 days, 3 times a day

It is a good water flosser for anyone who wants to make the "change" from regular dental floss, and the truth is that I have noticed a big difference. It cleans deeply and removes difficult spots, food, plaque, etc. I believe it is a very good investment for your life. It makes you feel like you just came out of the dentist, and no, it does not harm the gums. There have been studies, you can look it up if you doubt the purchase. It arrived in about 6 days and it is a very good choice. For more information, watch the video. Thank you for your time.