EVEREADY® Super Heavy Duty Carbon Zinc: Frequently Asked Questions

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Eveready® Super Heavy Duty batteries meet a wide variety of low drain applications, such as:
  • Clocks
  • Flashlights
  • Lanterns
  • Garage door openers
  • Remote controls
  • Boom Boxes
  • Calculators

For devices that have a higher drain, try Eveready Gold® alkaline batteries.

Mixing battery types in a device is not recommended and can significantly increase the potential for leakage and reduced performance. The biggest problem is an imbalance in available energy between the installed batteries. So always practice smart battery care and replace used batteries with new, fresh batteries of the same brand—preferably Eveready.
Batteries can be short-circuited by metal items such as coins, keys, paper clips, etc. A battery that experiences a short circuit can become very hot, increasing the potential for leakage and personal injury. For additional Do’s and Don’ts surrounding proper storage, care and handling of batteries, visit our Battery Care page.
Eveready will repair or replace, at our option, any device damaged by Eveready® Super Heavy Duty batteries. Guarantee void if batteries are charged by user or device.
Storing batteries in refrigerators or freezers is not required or recommended for batteries produced today. In fact, cold temperature storage can harm batteries. To maximize performance and shelf life, store batteries at normal room temperatures with moderate humidity levels.
There are several factors that impact battery run time. The most critical is the rate at which a device consumes power. A high-drain device like a digital camera will deplete a battery much faster than a low-drain device like a clock.
It’s safe to drop them right in the household trash. In 1989, Energizer became the first company to remove all added mercury from alkaline batteries.
Typically, carbon zinc batteries will not leak under normal storage and usage conditions. However, the potential for leakage is significantly increased if batteries are subjected to deep discharging, charging, mixing of battery chemistries, mixing of fresh and used batteries, physical damage, or extended exposure to high temperature. Carbon zinc battery leakage is extremely caustic and contact with bare skin should be avoided. In the event that battery leakage comes in contact with your skin, flush the area for 15 minutes with copious amounts of water.
Standard carbon zinc batteries are not designed to be recharged and should never be placed in any battery charger. Attempting to charge carbon zinc batteries will significantly increase the likelihood for leakage to occur.