This is C.L. ‘Red’ Scholefield AMA 951 sometimes known as the ‘Battery Doctor'
If you have questions concerning any R/C battery pack, the place to go for answers is Red's R/C Battery Clinic. Red has a BSEE degree. For the better part of his carrier he was involved with batteries of all types and their useage. He has been interested in model planes since his pre-teens, so his knowledge of models and batteries pay compliments to each other. He is known throughout the R/C modeling industry. Find his website under my 'Articles' > ‘Links’ > ‘Supplies and Advice’. (This photo of 'Red' will change every few months)