A well known Hong kong based store has a special at present on discounted Turnigy Graphene 5000mah 4s 45C batteries. I purchased six of them but am a little concerned with the items received. The instructions state prior first charge to check the cell voltages are between 3.7 and 3.85 volts.
So far three of the batteries the cells #1 and #2 have been within the range but cells #3 and #4 below with battery #1 indicating cell #3 3.66v and cell #4 3.61 and battery #2 cell #3 and #4 were 3.65v. On battery #3 cell #3 was 3.55v and cell #4 3.61. On battery #4 all cells were 3.80v prior first charge.
I believed that the graphenes were supposedly higher quality and had matched cells. If the prices are discounted because the batteries are seconds quality then surely this should be highlighted. Are the above cell voltages too low, please? I am still to test batteries #5 and #6.
Bookmarks