These batteries have a PN: NP 18-12
B, while R34 states
Quote:
R34
The only legal source of electrical energy for the ROBOT during the competition, the ROBOT battery, is one of the following 12VDC non-spillable lead acid batteries:
MK Battery (P/N: ES17-12) or
EnerSys (P/N: NP 18-12)
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What is the significance of the B? From what I can tell, these aren't legal, the part numbers aren't the same.