After having some bad luck with other suppliers sending dead batteries I was anxious and paranoid to say the least.
After receiving my purchase I (incorrectly) tested the voltage on PLP batteries to be less than full and immediately wrote a less than favorable email to their contact address.
Not only did they address my issue by testing other batteries from the supply they had sent mine from, but Rick Polete, the company owner, wrote me an extremely understanding reply email explaining exactly what he believed the problem to be. He was correct and identified my testing error, which once corrected showed the batteries to be 1.59v.
In that same email, he personally assured me that they test and rotate all of their stock, donate batteries that are old and 100% stand behind every product they sell. He also took the time and commented on a personal note regarding my son's toy (the batteries purpose), which is something so warming in this cold digitized world we exist in - it meant a lot.
I will be checking PLP first for all my future battery needs! They have great batteries, and great people too!