BOSCH GXS18V-23B21 18V Starter Kit with (2) 18V 1.5 Ah Slimpack Batteries and (1) 18V Standard Battery Charger

More time.More power=More work gets done!Just realize that this largest version of Bosch's 18 volt batteries will only fit in certain Brushless and/or PROFACTOR tools such as their Leaf Blower and certain Impact Drivers etc etc.But when it fits in the tool, it delivers more energy for more time. A fantastic addition to your Bosch collection!

The media could not be loaded. REGISTERING:Having bought two kits, there was some trouble figuring out how to decipher the numbers and register them online. But before that, Brave Privacy Browser on an Verizon S22 Ultra had issues with the Bosch Site; Google Chrome will allow you to register the equipment.Now the Serial Numbers were supposed to be 9 digits long, but as you can see they are broken up and there are three groups of numbers scattered on the charger keeping you guessing. So see the attached pictures in my review.For the Charger, it's basically the 6 numbers under the QR Code, plus the 3 Numbers before the Character at the end of the 4 digit alphanumeric code to the right and above of the QR Code - again, just look at the picture.On the Battery it's much easier. It's the 9-digit number after the 4 digit alphanumeric code, and it can be found at the top of the battery just behind the red release button. Again can be seen in the pictures.CHARGING:After having charged three 8AH Core 18V Batteries, each on one of the following:BC1880Helion 160CHelion 160C with Powerboost enabled....I can say it's not what they claim with it being, what was it, 8x's faster. Maybe that's to a standard Bosch Charger (which I haven't used one since 2011); but it's honestly about 1.4x's faster than the original BC1880 Fast Charger (228W vs 162W), and with the Powerboost enabled 1.9x's faster (309W vs 162W).As far as times go - this is where it gets a bit odd with the 160C and Powerboost. Using Powerboost gets the 8AH battery to 50% in 17 minutes and done in 26 minutes "to 80%" and then shuts off! It doesn't cool off and restart and finish to 100%, it just shuts off at 80%?? Idk the reasoning behind this, but even at 45 degrees in the room and slightly warm to the touch, it's off even 15 minutes later and never restarted.Now without Powerboost, this other 160C unit charges up to 80% somewhere in around 34 minutes and then progressively slows down to around 50-55% of it's charging wattage (115W on average). I say on average because if you have a Kilawatt Inline Power Meter, it linearly slows down the input charging wattage as you reach 100%. But for the total charge time, it took 52 minutes.And compared to the BC1880, it's still chugging along respectably, and starts dialing down from the stabilized 180W at the 80% threshold in what it appears to be in around 44 minutes; and then continues on the last 20% till about 61 minutes have past till it completes the charge.Now putting the Powerboost charged battery back on it's Helion 160C Charger after sitting for 25 minutes made it run at fast charge at 224W for about 4 minutes on the last 20% and then slow down for the remaining 16 minutes, for a total of 20 minutes. Yeah, that's 20 whole more minutes!! Doesn't really make a whole lot of sense at first - but my assumption is that Powerboost just to throws a quick charge on the battery to be responsible enough to dodge overheating and overcharging the battery in the last 20% - something of a lithium battery issue for longevity that you can control in higher end Galaxy Cell Phone Settings and I know it pretty well also in the large 2kW EcoFlow Powerbank Batteries like the Delta 2 Units - in those it preserves their life cycle usage. So in that respect this makes sense I suppose.In Summary:BC1880to 80% in 44 minto 100% in 61 minHelion 160Cto 80% in 34 minto 100% in 52minHelion 160C w/Powerboostto 50% in 17 minto 80% in 26 minNote: takes another 20 min after coolingoff to top off the batteryNote: two of these batteries on the Helion 160C's have only 1 or 2 charge cycles on them, while the B1880C has about 6 charge cycles. These are relatively new, so these numbers should be highly accurate.

Excellent product. It came sooner than expected. Thanks for everything

I had a bunch of smaller Bosch batteries and would have to swap them out to finish long jobs, but this one just keeps going and going and going. It didn't last so long the first time around, but ever since then it's been killer -- I think it just needed to good first recharge. Also, I'm charging it with my old small-battery Bosch chargers, so it probably takes longer to recharge than it would with a newer fast-charge charger, but that's not a problem -- I don't use it so fast that I need a quick recharge. Very, very happy with this battery.

Good value for Bosch 18 volt batteries

heavy duty

Batteries came with one bar and took a while to charge due to me only having a normal charger . They are big batteries but very powerful.

One thing to know: Bosch Core batteries have 21700 batteries inside. Practically all others on the market have 18650's which are smaller and run hotter, they are yesterday. Milwaukee is just starting to bring them on market in their Forge, although I do have a couple of Milwaukee 3mah with 21700. Bosch has been using them for quite a while. 21700 are the way to go. You will start to find the older Milwaukee batteries on sale now while they switch over to Forge. I have 6 cordless Bosch tools and I love all of them. They all run better due to 21700"s inside the Core.