Sub C batteries are the heavy-duty backbone of legacy cordless equipment, specifically engineered with a shorter, wider profile (23 mm x 43 mm) to deliver the high-current discharge required by high-torque motors. While manufacturers have largely pivoted to Lithium-ion, these cells remain the gold standard for DIY enthusiasts looking to rebuild and "up-cycle" vintage NiCd or NiMH power tool packs. By soldering new Sub C cells into the original housings, hobbyists can resurrect perfectly functional drills and drivers, often surpassing the original factory runtime by using modern cells with higher milliamp-hour (mAh) ratings.
Below are Sub C size batteries with options with tabs and without tabs.
| NiCD | NiCD | NiMH | NiMH | NiMH | NiMH |
2200mAh Sold out | 2200mAh Sold out | 3000mAh Sold out | 3800mAh Sold out | 4200mAh Sold out | 5000mAh Sold out |
Sub C Dimensions
Tenergy Sub C batteries are 23 mm x 43 mm. 4/5 Sub C and C size batteries can sometimes be confused with Sub C; it is crucial for ensuring compatibility with your DIY project to understand the size and naming differences:
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Standard Sub C
This is the common size for most power tool rebuilds, measuring 23 mm by 43 mm. -
4/5 Sub C
A shorter variant measuring 23 mm by 34 mm. -
Standard C
The largest of the three at 26 mm by 50 mm; it is generally too wide and tall for standard cordless tool battery housings.
