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Shorter version: He builds them to use briefly and sell

It's a hell of a lot cheaper than any battery analyzer

Of the 46 studies (Table A1), 33 [11,12,13,14, 18,19,20,21,22, 24, 27,28,29,30, 32, 36, 38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54] were from China, 8 [9, 10, 15, 17, 23, 26, 34, 35] from the US, 3 [16, 33, 37] from Italy, 1 [8] from the UK, and 1 [25] from South Korea

REACH Day School Program (Relationship and Character Building, Emotional Regulation, Academic Achievement, Coping Skills Training, High Expectations for Student Success) : For students with significant social, emotional, or behavioral disorders who require a therapeutic setting