Kastar Rechargeable Shaver Battery Pack AA 2.4V 2000mAh Fits Most Norelco, Remington Shaver Models and Others (deatil Compatible Models Please Search The Below Description)

Simple repair/maintenance.

Excelente

It was a direct replacement for Wahl 9649 trimmer, it is 2000 mAh as opposed to 1500 mAh which is an improvement. Solders in exactly the same. I noticed some reviews were negative due to having to solder, this is a drop in replacement for the original which requires soldering.

These two batteries are connected in series via a shard tab at one end. This may or may not be ideal for you, depending on whether this is how the original or existing batteries are situated in the shaver you are repairing. If the shaver you are refurbishing has batteries with individual tabs and the four individual tabs are soldered into the circuit board at four individual points, this will not be the best solution for you. In this case, you want to purchase two individual batteries that each have tabs at both ends, so that you can solder them to the board separately.The shaver I refurbished is a Braun 7526. Even though the batteries are in fact connected in series, they are individually soldered to the circuit board, onto separate solder pads which are electrically connected on the circuit board via a lump of solder. When I ordered this pair of batteries, I did not notice that they were joined in series at one end, and even though I searched, Amazon did not show me any alternatives for individual batteries each with tabs at both ends. Or maybe Amazon did show me alternatives and I didn't notice. In any case this wasn't the best option for me, it turns out.Even if the two batteries in a shaver appear to be wired in series, in order to be absolutely certain, in the case where the batteries are so far gone that they won't take any charge at all, you have to closely inspect the circuit board and check the resistance, using a meter, between the two solder pads at one end. Obviously if the two batteries are individually soldered to the board, you have to figure out which end, on the circuit board, is the end where they are joined on the circuit board. And there is always the possibility that even though they are wired in series, there could be another connected on the circuit board whereby half of the total series voltage is taken for some purpose. This probably is very unlikely, but it is nevertheless a possibility that you have to rule out by close inspection of the board.It turned out, in my case, that the end where the two batteries are connected in series via the circuit board is the end furthest from the shaving head and adjacent to the opening where the charging cord connects. It was necessary for me to figure this out, by inspecting the board and confirming with the Ohmmeter, in order that I would know which of the two original solder pads to use and which pair I would not have to bother with. But now the problem was that when I oriented this battery pack so that the ends with the exposed tabs were are the correct end of the board, i.e., the end where the two solder pads are not electrically connected via the board, the polarity was wrong. This left me with two options. One approach would be to separate the two batteries buy snipping the tab that joined them at one end, in which case I would need to solder a wire to each half of that tab, so that I could connect both batteries to the circuit board at that end. In this case, I would simply swap the positions of the two batteries, in order to correct the polarity. The other option was to flip the dual battery pack over. Not rotate it end by end, but flip it the other way, so as to cause the two tabs to point up instead of down toward the circuit board. This would mean that I would have to solder wires to the two tabs and then carefully fold them so that the attached wires would point down into the circuit board. This is what I decided to do, but it was a risky endeavor because those tabs are fragile and are not meant to be folded over. I could easily have broken one of them.I used some 24 gauge single strand wire. A finer gauge would have been better, but 24 gauge was the finest gauge I had on hand. In hindsight, it would have been better to strip a piece of multi-strand wire where the individual strands are a gauge slightly finer than 24 gauge. Obviously you want the wire to extend in the same direction as the tabs, so that when you fold the tabs, the wires will extend in the correct direction. I did it in a way whereby I needed to fold the wire along with the tab, which I thought would give the tabs a little extra strength at the fold. It turned out that this was a good idea. Obviously you do this before you solder, i.e., you stick the little wire into the little hole in the tab and fold it over and hold the thing in place using a piece of painter's masking tape before you apply the solder.On the cover half that goes down onto the batteries, there is a part that sort of captures the ends of the batteries to help hold them in place. You need to check and make sure that this does not collide with the tabs before you solder the thing to the board. I put a little piece of thin double-sided tape on the board at the end that wouldn't get soldered down. I also stuck a carefully cut small piece of gorilla tape over the end with the tabs which now had wires soldered to them, in order to insure that they would not make contact with other, exposed electrical contacts at the rear of the motor and very, very close to that end of the batteries with the exposed tabs with the wires now soldered to them.Because I did this without rushing and thought each step through carefully before I did anything, it went without a hitch and I now have a good-as-new Braun 7526. But it would have been easier and less risky if I had used two independent batteries each with open tabs at both ends.

Very well constructed

Shaver runs like new with the new batteries.

These batteries are Ni-MH batteries that won't work with my vintage Norelco shaver (The picture shows that they are NI-MH batteries, so partially my error not looking closely enough to the picture). In the product description, it says these can replace 1.2 volt AA NiCD batteries 1000mAh or less. This is wrong since my Norelco shaver was designed for NiCD batteries , and will not charge NI-MH properly.For the price, it wasn't worth my effort to complain to the Seller about this. This was the first time I tried non Panasonic NiCD batterie for my shaver. I have gotten 4 to 5 years of life out of genuine Panasonic NiCD batteries (my shaver is 25 years old) , so it was stupid of me to try some "cheaper" brand.

Perfect match for my old Norelco razor. Not an easy installation if you don’t completely suck out the old solder where the battery tabs go through the circuit board as the tabs are very thin/ bend easy. Fun to do the repair anyways. Make sure you have a solder sucking tool!!!