21700A (Ampace) 21700 Li-Ion 4000mAh
Ampace

21700A 4000mAh 21700 Li-Ion Battery

21700 Li-Ion 4000mAh rated
from €3.25/cell
102%
of rated capacity
at 100mA
14
independent tests
€3.25
best price / cell
68.2g
avg weight
2 measurements

This battery delivered 102% of its rated capacity (4097mAh tested vs 4000mAh rated) at 100mA. Higher current tests naturally yield lower capacity due to increased internal resistance.

Discharge Curves
Capacity vs Current
Single cell GTIN: 6097331840898
Nkon
Netherlands · nkon.nl
1 week ago
€3.25
Milnik
Romania · milnik.ro
1 week ago
€3.71
lei18.90
Rated capacity 4 Ah
Cell voltage - Nominal 3.70 V
Charge cut-off voltage 4.20 V
Discharge cut-off voltage 2.50 V
Standard charge current 2 A
Maximum charge current 8 A
Maximum discharge current 45 A
Internal resistance ≤ 4 mΩ
Minimum charge temperature -10 °C
Maximum charge temperature 60 °C
Minimum discharge temperature -30 °C
Maximum discharge temperature 75 °C
Maximum discharge surface temperature ≤ 80 °C
Diameter (max) 21.31 mm
Height (max) 70.42 mm
Weight ~ 70 g
2 measurements
Mdn
Avg
Min
67.99g
Median
68.24g
Average
68.24g
Max
68.49g
Std Dev
0.35g