... your drawings, samples, or assist you with your design. Battery spring have single type,AA group type,AAA group type. TypeAA ... ~ 10 mm and above.Free LengthThe overall length of a spring in the unloaded position.Processing Machines:Auto lathes machines, conventional ... .Payment TermsT/T, L/C,Western Union,. Battery plate,,battery contact,battery contact plate,battery contact pin