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Our Newsletter

Batteries High Energy and Chargers


These batteries will power electronic devices when portability is needed, such as some of our HV power supplies, ozone generators, lasers, or handheld tools, toys, computers (with the help of inverters) and associated equipment, etc.

Years ago, alkaline batteries replaced the old carbon zinc batteries and improved the energy storage by a factor of 3 to 5 times, and had a longer shelf life. Modern lithium-ion batteries have up to 50% more energy storage capability than alkalines, and can be recharged up to 1000 times. These two factors make lithium-ion batteries a great candidate for projects that require a lot of power on demand, more storage capability and of course the ability to be recharged makes up for the extra initial cost.

A note on battery chargers: these chargers are specifically for charging batteries. If they are used as a power supply, there is a good chance that they will severely damage the device being powered. This is because battery chargers need to have a higher voltage than the battery they are charging, which is required to start the charging action (12V battery chargers can often exceed 16V, for example). So do not use chargers for power supplies as you may damage or destroy your electronics.

Rechargeable Sealed Lead-Acid (SLA) Batteries

Lead-acid batteries are one of the oldest types still in use today. This battery is still largely used with any type of engine that requires mechanical pre-starting. Some of the interesting properties of this battery is that the available current is very high, being well into hundreds of amps for a typical automobile. The short circuit current out of the lead acid battery can be so high that without some external control the battery will blow up. This type of battery was even considered in the early days of railguns as being a possible source of pulse power because of this high current property.

12V 7A hours
For science projects where 115VAC is unavailable. Dimensions: 6 x 2.5 x 3.7" at 3 lbs. Can use CHARGER12 (below) to charge from a wall outlet.
BAT12/7 - SLA Battery ... $29.95
12V 5A hours
More compact than the BAT12/7, for projects that require a smaller power source (3.5 x 2.75 x 4"). Can also use CHARGER12 to charge from a wall outlet.
BAT12/5 - SLA Battery ... $24.95
Charges 2 volt / 6 volt and 12 volt batteries
  • Short circuit and wrong polarity prevention
  • Constant final charging current
  • Charging will only take place with correctly connected battery
  • Optical display for charging and polarity
Note: NEVER use battery chargers to power electronic devices. A "12V battery charger" can output up to 20 actual volts. This extra voltage enables it to charge a 12V battery, but the same extra voltage can burn out your 12V electronics. So either use the correct 12V power supply or a 12V battery, but never power your electronic devices with battery chargers.
CHARGER12 - ... $14.95

Rechargeable 3.7V Lithium-Ion (Li-Ion) Batteries
3.7V 2400mAh
One (1) li-ion 18650 rechargeable battery, at 3.7V and 2400mAh (used with our high-power portable lasers, but also for many other electronic devices). Recharges from our CHARGE18650 or any similar recharger. Color may be different from that shown in photo, but the functional operation will be the same.
BAT18650 - Li-Ion Rechargeable 18650 Battery 3.7V 2400mAh ... $7.95
18650 Battery Charger
Charger for 18650 rechargeable batteries, plugs into a standard 115VAC wall outlet. Charger may appear different from photo (power cord, color, dimensions, LED lights, etc.) but the functional operation will be the same. Dimensions: 2.6" length x 0.7" diameter at 1.6 ounces.
CHARGE18650 - 18650 Battery Charger ... $14.95

Rechargeable 12V Lithium-Ion (Li-Ion) Batteries

Portable 12V DC power from a compact lithium-ion battery pack. Convenient on/off switch with indicator light gives power control without needing to unplug. Includes 2.5mm jack and plug for input/output connections. Also includes AC adapter for charging from a wall socket.


12V 1800mAh
Dimensions: 3.8" x 2.25" x 0.8" at 6 ounces. Includes battery and charger.
BAT12/1800 - 12V 1800mAh Li-Ion Rechargeable Battery ... $19.95
12V 1800mAh
Enclosed case. Dimensions: 3.9" x 2.4" x 0.9" at 7 ounces. Includes battery and charger.
BAT12/1800-BOX - 12V 1800mAh Li-Ion Rechargeable Battery ... $20.95
Dimensions: 5" x 2.7" x 0.9" at 9 ounces. Includes battery and charger.
BAT12/3800 - 12V 3800mAh Li-Ion Rechargeable Battery ... $26.95
12V 4800mAh
Dimensions: 5.1" x 2.6" x 0.9" at 10 ounces. Includes battery and charger.
BAT12/4800 - 12V 4800mAh Li-Ion Rechargeable Battery ... $31.45
12V 6800mAh
Dimensions: 6.25" x 3" x 1.25" at 15 ounces. Includes battery and charger.
BAT12/6800 - 12V 6800mAh Li-Ion Rechargeable Battery ... $36.95
12V 9800mAh
Dimensions: 6.1" x 3" x 1.5" at 25 ounces. Includes battery and charger.
BAT12/9800 - 12V 9800mAh Li-Ion Rechargeable Battery ... $49.95