BAT609 18V 6000mAh Lithium Battery Replacement for Bosch 18V Battery 17618, 17618-01, 24618-01, 25618, 26618, 37618 Cordless Power Tools Battery

I just received the battery the other day Putting Around and the charger and charge dried up and ate Howard my Bosch as the flash chipping hammer basically all day when I was drawing out windows and doors for shade on alarms. I am so happy that this battery works because it’s a fraction of the cost of the Bosch batteries and out of the Bosch batteries. I bought two out of the four won’t charge anymore. Anyways, we’ll see how it does in the long run, but I was very impressed with the first day of use. I would like to order more, but I want to see after it dies and it really charges how long it lasts. Today it lasted all day drilling holes through concrete and it being cordless is just awesome. Thanks so much to the seller and Amazon for getting it to me so quickly I really appreciate it and I appreciate the item. I’ve gotten a few items here lately that are advertised to do some thing and they just don’t work at all and I was so happy that this battery worked with the Bosch tools. A+++Seller A+++ Amazon!

I use my Bosch power tools for work and at home, a lot of use definitely. I've only had this battery for a couple months, but it works great with similar but maybe a bit less run time as Bosch batteries. But my large bosch batteries are 9ah, bigger than these batteries. So it's unfair to compare that way.As far as longevity, I don't know yet. But Bosch batteries don't last very long in my experience (altho they warranty them with no questions asked, very quickly).I'm going to eventually go with this generic brand for replacing my Bosch batteries eventually. After my warranties run out

Decent inexpensive replacement batteries for my Bosch cordless drill. Works just fine, locks in place without any problem, charges up on the original Bosch charger fine.I think the 6 AH rating has got to be wishful thinking as this pack is only double the size of the original (1.5AH), and doesn't weigh much more. I don't use this drill for such long periods of time that it should be an issue

Pretty good for a generic the price was amazing compared to the original ones

After reading reviews, I figured, sure, it may not be a 6ah battery, but a Bosch 4 ah is $50-60. And at $20 it is worth a risk. Let the rookies use my tools and these batteries. Work fine. Will find out in the long run if they wear out faster, but daily use seems great. Well worth the cost!

Fits just fine but doesn’t last as long as a Bosch brand battery

Drastic drop in output after 2 days of moderate use. This tests at 3ah, half its rating. I didn’t expect a full 6ah as it’s rated, but 3ah is flat out not being honest. Price is simply too good to be true. The power indicator went from showing full leds to 1 a min later with no additional use.

As I do with many replacement batteries, the first thing I did with this one was test it. I charged it until the Bosch charger said it was done, then left it on the charger for another hour to make sure it was topped off.I then set up my battery tester for a constant load of 1 amp and a cut-off voltage of 16.5, which is 3.3v per cell, commonly recognized as a discharge point that will only get you 93-95% of the total capacity, but will result in a much longer battery life (number of cycles).As you can see in the photo, the battery tested at 2.82AH, significantly less than the advertised 6AH (47%). I didn't expect to get 6AH, but was hoping for something closer to 4AH. No luck. I noticed that the built-in charge level indicator showed 1 LED (out of 3) so bear in mind that 1 LED might mean the battery is near empty.I ran the same test on a 2.6AH Bosch battery that is at least 6 years old, using the 1 amp drain and 3.3v per cell cutoff. It tested at 2.05AH (2nd photo) or about 79% of the rated capacity, which is pretty good for a 6-year old battery. It also indicates to me that a 1-amp drain test is not unreasonable for this type of battery.I only purchased this battery so I could take it apart and replace the cells with high-quality ones and rewire it for 8 cells in series (28.8v) for use with a home-made leaf blower that uses the Bosch batteries. The regular 18v batteries provide enough air for use in the shop but not quite enough for the patio. Of course I'll have to use a different charger for the higher voltage batteries.