Several of us have talked about using the spring-topped Garrity 4* D cell adapters that are used in place of a 6V lantern battery.
These adapters have very high internal resistance and cause severe voltage drop when the current exceeds 1 A. I just measured the same 4 fully charged Nexcell 8500 mAh D cells in this adapter and in a wire terminal Radio Shack 2 * 2 adapter under load and saw the following.
Garrity at 3.35 A = 3.8 V
R/S at 3.35 A = 4.8 V
Garrity at 1.95 A = 4.0 V
R/S at 1.95 A = 5.0 V
I now feel much better about my plans to cut the Garrity adapters apart so that I can use only the top surface and it's spring connectors for the terminals of a 6 * D cell battery pack that will be the same size as the unmodified Garrity adapter.
These adapters have very high internal resistance and cause severe voltage drop when the current exceeds 1 A. I just measured the same 4 fully charged Nexcell 8500 mAh D cells in this adapter and in a wire terminal Radio Shack 2 * 2 adapter under load and saw the following.
Garrity at 3.35 A = 3.8 V
R/S at 3.35 A = 4.8 V
Garrity at 1.95 A = 4.0 V
R/S at 1.95 A = 5.0 V
I now feel much better about my plans to cut the Garrity adapters apart so that I can use only the top surface and it's spring connectors for the terminals of a 6 * D cell battery pack that will be the same size as the unmodified Garrity adapter.
