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$35.53Cardio E3 INR18650-4S1P Medical Replacement Battery 2600mAh
14.4V2600Li-ionReplacement battery for E3. Specifications: 2600mAh, 14.4V, Li-ion. Compatible with: E3. Replaces: Cardio INR18650-4S1P. Cardio replacement battery designed for Medical devices. Engineered for consistent power output across many charge cycles.
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$43.83Cardio E3 INR18650-4S2P Medical Replacement Battery 5200mAh
14.4V5200Li-ionReplacement battery for E3. Specifications: 5200mAh, 14.4V, Li-ion. Compatible with: E3. Replaces: Cardio INR18650-4S2P. Cardio replacement battery designed for Medical devices. A direct drop-in replacement for the original battery.