6 Volt Golf Car

8 Volt Golf Car

Renewable Energy

6Volt Sweeper/Scrubber and Multi purpose

12 Volt Sweeper/Scrubber and Multi purpose

8 Volt Marine

12 Volt Marine

12 Volt Multi Purpose

6 Volt Automotive and Commercial

8 Volt Tractor and Commercial

12 Volt Truck-Bus-Commercial

12 Volt Golf Car and Automative

Care, Frequently Asked Questions & Specs

New batteries should be given a full charge before use.

New batteries need to be cycled several times before reaching full capacity (50 - 125 cycles, depending on type). Usage should be limited during this period.

Battery cables should be intact, and the connectors kept tight at all times. Systematic inspection is recommended.

Vent caps should be kept in place and tight during vehicle operation and battery charging.

Batteries should be kept clean and free of dirt and corrosion at all times.

Batteries should be watered after charging unless plates are exposed before charging. If exposed add just enough water to cover plate tops by 1/8". Check acid level after charge. The acid level should be kept 1/4" below the bottom of the fill well in the cell cover.

Water used to replenish batteries should be distilled or treated not to exceed 200 T.D.S. (total dissolved solids...parts per million). Particular care should be taken to avoid metallic contamination (iron).

For best battery life, batteries should not be discharged below 80% of their rated capacity. Proper battery sizing will help avoid excessive discharge.

Battery chargers should be matched to fully charge batteries in an eight hour period. Defective chargers will damage batteries or severely reduce their performance.
Avoid charging at temperatures above 120°F or ambient, whichever is higher.

Deep cycle batteries need to be equalized periodically. Equalizing is an extended, low current charge performed after the normal charge cycle. This extra charge helps keep all cells in balance. Actively used batteries should be equalized once per week. Manually timed charges should have the charge time extended approximately 3 hours. Automatically controlled chargers should be unplugged and reconnected after completing a charge.

In situations where multiple batteries are connected in series, parallel or series/parallel, replacement battery(s) should be of the same size, age and usage level as the companion batteries. Do not put a new battery in a pack which has 50 or more cycles. Ether replace with all new or use a good used battery(s).

Periodic battery testing is an important preventative maintenance procedure. Hydrometer readings of each cell (fully charged) gives an indication of balance and true charge level. Imbalance could mean the need for equalizing; is often a sign of improper charging or a bad cell. Voltage checks (open circuit, charged and discharged) can locate a bad battery or weak battery. Load testing will pick out a bad battery when other methods fail. A weak battery will cause premature failure of companion batteries. Always use a matched voltage charger and battery pack system. An undersized charger will never get the job done, no matter how long you let it run. An oversized charger will cause excess gassing and heat; this situation could cause explosions or other damage.

As batteries age, their maintenance requirements change. This means longer charging time and/or higher finish rate (higher amperage at the end of the charge). Usually older batteries need to be watered more often. And, their capacity decreases.

Lead acid batteries should be brought up to full charge at the earliest opportunity. Avoid continuously operating batteries in a partially charged condition. This will shorten their life and reduce their capacity.

Extreme temperatures can substantially affect battery performance and charging. Cold reduces battery capacity and retards charging. Heat increases water usage and can result in overcharging. Very high temperatures can cause " thermal run-away" which may lead to an explosion or fire. If extreme temperature is an unavoidable part of an application, consult a battery/charger specialist about ways to deal with the problem.

Inactivity can be extremely harmful to all lead acid batteries. If seasonal use is anticipated, we recommend the following:

a. Completely charge the battery before storing.
b. Remove all electrical connections from the battery, including series/parallel connectors.
c. Store the battery in as cool a place as possible. However, do not store in a location which will consistently be below 32°F. Batteries will discharge when stored, the lower the temperature the lower the self discharge.
d. When not in use, boost every two months.

Q: How to charge USBMC deep cycle batteries.
A: There are numerous correct ways to charge the batteries. Typically, charge at C÷10 amperes, (where C = the 20 hour capacity of the system expressed in Ampere Hours) until the battery voltage rises to 2.583 Volts per cell (i.e. 7.75 volts for a 6V battery). Hold this voltage constant for 2 to 4 hours, and stop charging. A similar method would be to charge at the following upper limits and terminate the charge when the time limit is reached:
* Charge Current = C÷10 Amperes
* Charge Voltage = 2.583 Volts per Cell
* Charge Time = 10 Hours Battery temperature adjustment: reduce the voltage by 0.028 Volts per Cell for every 10°F above 80°F, increase by the same amount for temperatures below 80°F.

Q: What is the float voltage for standby applications?
A: 2.17 Volts per Cell adjustment for the temperature as above.

Q: What size battery do I need for my application?
A: Determine how many amperes your application needs from the battery and for how long. Multiply the two to obtain Ampere Hours required. Increase this by 20% for a safety cushion, and from our capacity charts, match a battery which will deliver this many AH for the required time, and voltage. Connecting batteries in parallel adds AH, and connecting in series adds the voltage. In either case the energy (WH) storage capability is increased by the amount of energy each additional battery provides.

Q: What is the cycle life of your batteries? Your competition says theirs last the longest.
A: Any claims of lasting longer are based on selective data, as a marketing gimmick (i.e. selecting the best of one and worst of the other) and is misleading. Battery life, like anything else, cannot be precisely pre-determined, any more than the life of your car or humans. The actual life out in the field, when operated under identical conditions, is the only valid criteria. One way to differentiate the life and performance is to look at the amount of materials, and the type of materials used in making the product. U.S. Battery Manufacturing Company uses more of the life and capacity giving active material than our competitors. Plus the unique grid alloy, and state of the art processing technology, gives you the best possible life and performance.