These batteries made in ex-USSR and still fully working state.

Lot for 1 battery.

Look video of testing one of similar, but smaller batteries 3MHM-7Ch (that also in stock!) at usual water from faucet. Also can work in salt water same.

Water-active batteries are used as emergency power supplies in various rescue

devices. But if there are enough of them, they can be successfully used as the main source of energy. Which is especially convenient in flooded caves.

Water-filled copper-chloride batteries are disposable batteries used for emergency search lights at sea.

'Mayachok-1'', "Mayachok-2" and 2.8MHM, together with the lamp, are sealed in a plastic bag and stored in a thawed form. They have a polyethylene body, in the side wall and on the bottom of which there are holes, closed with plugs until use, To bring the battery into working condition, you need to remove the plugs and fill it with sea water or saline solution (concentration 15 g/l).

“Beacon” batteries, when working with an MH 3.0-0.14 lamp, provide stable illumination.

"Mayachok-1" for 10 hours, and "Mayachok-2" - 15 hours.

 It can be filled with both fresh and sea water. Its service life for the same lamp

- 6 hours.

They are easy to use, and when dry, their shelf life is almost unlimited.