18650 / Coin Cell Battery Holders
Coin cell and cylindrical battery holders built for four-terminal Kelvin-type measurement.
- Four-terminal Kelvin measurement, which is what removes cable impedance from EIS on small cells
- Coin holder takes 2016, 2025 and 2032; cylindrical holder takes 18650
- Each holder takes two cells, with a jumper bar to put them in series
- Gold-plated contacts to reduce contact impedance
- Cable connections laid out to reduce inductive pickup between current-carrying and sensing leads
Cited in the literature
Independent research citations for this instrument are provided by Bioz and appear here once the widget loads.
Gamry’s Battery Holders are designed for four-terminal Kelvin-type measurements.
- The coin cell holder can accommodate 2016, 2025, and 2032 sized cells
- The cylindrical holder is designed for 18650 sized cells.
Each holder can hold two cells and includes a jumper bar that can be used to place the batteries in series.
992-00158.............................. Dual 18650 Battery Holder
992-00159.............................. Dual CR2032 Coin Cell Holder
Product Details
Battery Test Equipment
Anyone doing EIS on coin cells or 18650s needs four-terminal measurements in order to eliminate additional impedances due to cable connections. The contacts on each holder have been gold plated to reduce contact impedance and cable connections have been designed to reduce inductive pickup between the current-carrying leads and the sensing leads. The cable connections also ensure a reproducible lead placement, reducing variability in your measurements.
The importance of four-terminal measurements cannot be understated. The Nyquist plot shown to the right highlights the significant benefits of four-terminal measurements over two-terminal measurements. You can see the increased resistances, seen as an increased x-axis offset and increased semi-circle diameter, and capacitance, seen as increased semi-circle height, associated with the two-terminal measurement.