Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: is it work with Bosch Bare-Tool PS21B 12-Volt Max Lithium-Ion 1/4-Inch Hex Driver--- link Bosch Bare-Tool PS21B 12-Volt Max Lithium-Ion 1/4-Inch Hex D
Document: Currently (December 7, 2013)  these are the ultimate amperage capacity battery for Bosch tools that use this configuration of plug-in 12-volt batteries. It is 2 amp. A predecessor BAT413 battery had 1.5 amps, and the original battery, the BAT411, had only 1.3 amp capacity. This battery is fully interchangeable with the other batteries in this series and, on my old Bosch driver, fits and is rechargeable by the original Bosch battery charger.
I bought two of these as back up to the four batteries that i've been using for more than three years. The first set of two batteries, BAT411 would last about two hours, while the other two, BAT412, would probably last for 4 hours of continous use. I used these batteries with the impact driver and hammer drill/driver, at home and at work.The BAT414 would last around 8 hrs.
This battery provides much better runtime for mu Bosch Multitool, however the design must be slightly different than the old because I purchased two of these batteries and they both have a tendency to stick when putting them in the tool. This doesn't effect the way they work but is slightly annoying. Other than that I have been pleased.
I bought this to run my flush trim saw. The battery out performs the 1.0Ah by a long shot. It worked great for a month. Now the contacts don't touch properly and you have to hold the battery on the tool to get it to run. I have had this problem with other Bosch 12v batteries of this shape and I don't know what to do with them. Seems like a poor connection design flaw.
The main feature of this new 2.0 Ah battery is longer run time than the older 1.2 and 1.5 Ah batteries. For even longer run times, but with more bulk and weight, the BAT420 4.0 Ah is also now available.
It may be useful for users who use Bosch tools for extended work sessions.
I'm not sure that I'm unhappy with the battery or the 3 1/2 saw that it drives--the combination is quite weak. The battery charges quickly and at full charge drives the little saw to make good cuts in a variety of woods and MDF. I've been using it on 1/2 and 3/4 plywood and MDF. At full charge I can cut about 8 feet well and easily. After that, performance drops like a rock.
I wanted a extra battery for my Bosch heated jacket. The battery would last about 4 hours and on some days I need to be out side for 8 hours or longer. Now I can change the battery and recharge the other one.
I have a bosch cordless 12v drill and impact driver purchased in 2008 and when the batteries went dead, I felt really bad tossing the drill drivers. I put them in a drawer and then I found on Amazon a replacement battery for them. Now, for a fraction of the price of a new set of drills, I have them working like new. Works with existing charger as well. Sure glad I didn't throw the drill drivers away.
I have a Bosch righ angle drill that is one of the most useful tools I own. This Battery works well with that tool and provides good long term power for my use. Good price for an excellent tool accessory.
Answer: no