Replacement Battery compatible with Braun Oral-B Sonic Complete Toothbrush, NiMH, 1600 mAh by E Toothbrush Care

When the batteries in my Sonic Complete died, I didn't feel like buying a new toothbrush. I still had a bunch of replacement brush heads, and I didn't want to let those go to waste. I found replacing the batteries to be pretty straightforward, but I can imagine it might be a bit intimidating for some people. When you remove the bottom of the toothbrush, there is a coil of thin wire attached to the bottom cap. Be careful not to break the thin wires that attach the coil to the circuit board. I didn't even bother desoldering the old batteries. I used a pair of pliers and peeled the tabs off of the old batteries. I folded the tabs on the new batteries backward and just placed them into the battery holder without soldering. I used a piece of cardboard at the top of the battery holder to ensure the tab that is connected to the circuit board presses against the tab that is connected to the battery. Then I put the bottom back on. No soldering necessary. Took me less than 5 minutes, and I haven't had any problems since. One thing to note is that the original batteries are NiCd, and these batteries are NiMH. These have a much higher mAh rating, so you don't have to charge it as often. NiCd batteries generally have lower mAh ratings, but can be recharged more times. These batteries might last longer if you don't charge them too often.

The batteries last about twice as long as the original batteries. I subtracted one star because there are zero instructions on how to replace the batteries. I subtracted a second star because they show a picture that suggests that the two batteries are joined. The batteries are loose. Overall the onus is on the buyer to figure out how to 1) solder the batteries together 2) solder the fragile assembly into the electric toothbrush.

I am fairly experienced at soldering. The soldering needed here really taxed my skills to the limit. I would not recommend trying to replace these batteries yourself if you are not a reasonably skilled solderer, or do not have access to a friend who is and can help you. Once I got the soldering done, got the toothbrush put back together, and charged the batteries, everything has worked fine.

After 1 1/2 days of work, my toothbrush works great! A few years ago I had etoothbrushbattery.com repair this toothbrush and they did a great job for about $30 to $35 including shipping, batteries, and tax. I should have done that this time instead of doing it myself. If you do it yourself I recommend using sissors to cut the battery lead instead of cutting pliers to get the lead to fit in the hole on the circuit board. I also recommend using a helping hands device while soldering. I also recommend removing the insulation on the leads before installing the new batteries.

i received this order very quick and considerable cheap,those batteries are very powerful have huge ampacity and also are easy to instal after all my toothbrush works better then new one,the only thing you have to be very careful when open the toothbrush because in the base of it is a little coil /a secondary winding for the charger/those wires are so tiny and can easy breakup and if you have enough luck what happen to me you can solder them back to the board,i did consider to buy new brush but still have spare heads so i saved more then $ 150,big thanks amazon....

There are 4 very fine wires right under the cap that immediately broke when I opened the toothbrush. I spent over a hour trying to solder them back again. The battery terminal strips had to be trimmed in order to solder them in place, rendering them unreturnable. After putting it back together and charging for 24 hours, it worked for 1 brushing and stopped. I haven't been able to recharge it since. It might be the switch. You'd think the company could factory solder the batteries together before sending them out. That was the most difficult part of the operation. Batteries with postage $26, cheap soldering iron and solder $24. Now looking for new toothbrush.

Worked perfectly with my sonic care. It took about 15 min (with all the tools, this might be the biggest problem for others. You will need a solder gun,solder,flush cut and a steady hand.) just remember. After releasing the base only push from the top while holding the base. There are very small,fragile, wires attached to the base. Watch the video, then watch it again. You should have no problems following the video. It was very well done

Got these installed without soldering as a couple others have mentioned. Just make sure you preserve enough of the original tabs so they make contact with the new ones. I folded the news ones over so they would contact the existing tabs. Fits snug with the spring on bottom pushing everything togethet. Toothbrush charges. Toothbrush works. I had more trouble getting the base twisted back on vs working with the batteries and tabs.