SGS/ISO9001 Lead-Acid Battery; 6V battery, Capacity 1.0Ah; Environmental friendly, leakage-proof; Lead-Acid Battery (2V 4.0AH);2V battery, Capacity 4.0Ah;Stable voltage, good performance, high volume ... resistance 54ohms Weight 0.25KGS Size 2.01*1.65*2.01in Applications:Our battery is suitable for all electronic devices. Lead-Acid Battery (6V 1.0AH)