If you have been watching or trying to shop in our store, you will notice that many of our batteries were temporarily unavailable. This is actively being resolved as soon as we have the new designs ready, which purge out alkaline batteries.
We’ve had enough! Leakage and resulting battery holder damage have been plaguing our customers. We don’t know why; alkaline battery manufacturers changed something in the last few years and now they are no longer what they once were. Duracell AA alkalines have been especially leakage-prone, but we have seen leakage with other manufacturers as well–from AA to D sizes. We’ve actually observed battery holders completely destroyed by these leaky cells. It starts out as a sneaky, small amount of chemical “sweat” on the negative terminal and before long, the entire holder is destroyed.
The new products are based on either Energizer Ultimate Lithium cells (which are literally breakthrough in nature) or new rechargeable chemistries which don’t have the leakage problems and never have. Here is a White Paper which summarizes this great new technology:
https://www.kensclockclinic.com/wp-content/uploads/2023/12/White-Paper-Model-1900L2.pdf
We are rolling out the new products and they will appear in the store as soon as they are available! Our new 1900L2, 1900G2 and rechargeable 1900R4 are already in the store, in stock, and ready to go.