Battery Chargers
Charging Rates and Times
A standard overnight recharge is normally recommended for typical
lead-acid batteries. This is based on a C/10 charge rate. (C=Ah capacity
of your battery). For example. The recommended charge rate for a
7 Ah battery is 700 mA. Battery manufacturers publish maximum in rush
rates for their batteries.
If a faster recharge time is required, the
following formulas can be used to determine either the correct charge rate
or the time required to recharge your battery to 90% of capacity. The
Ah rating of the battery x 1.2 divided by the charging circuit max
current, equals the amount of time (in hours) required to recharge the
battery to 90%. These times are based on a fully discharged battery. For
100% recharging, add 3 hours "float" time to the charging time. If the
battery is only partially discharged, the recharge time will be shorter.
|
Recharge Time (hours) = |
1.2 x Battery
Capacity (Ah)
Charging Current max (Amps) |
(add 3 hours for
100% charge) |
The rule of thumb is approximate however and
battery data from the manufacturer is the best way to determine the maximum
charge rate for a given battery. The 800 mA charger below has been
"blessed" by the battery manufacturer for use with the 5 Ah and 7 Ah
batteries on this page.
How to Order
To order a product, click on the
button next to the product.
When you are ready to complete your order, click on the
button.
Click on the small images to view larger versions.
|
Part # |
Description |
Photo
Click on image to view larger version |
Price |
Lead-time |
|
|
HPX10-12C080 |
Xenotronix Battery
Charger, 800 mA
Unique automatic battery charger charges and maintains 12 volt
batteries keeping them at full charge using float-mode monitoring.
Perfect for charging small batteries. Great for maintaining small and
large batteries kept in storage.
Automatically switches from full charge to float-mode monitoring,
LEDs indicate: Power/Float, Fast Charge and Fault.
Reverse-polarity protection
Perfect for use with 5 Ah or 7 Ah batteries. It is not
recommended for batteries greater than 8 Ah.
|
Specifications |
| High Rate
Voltage |
14.70 +/- 0.30 VDC |
| High Rate
Current (+/- 10%) |
Imax through Imax/7.5 |
| Float
Rate Voltage |
13.68 +/- 0.12 VDC |
|
Dimensions |
2.8" W x
3.8" H x 2.8" D |
| Weight |
Less than
1.5 lbs. |
|
Temperature Tolerances |
Operating 0° to 40° C or
32° to 104° F
Storage -40° to 80°C or -40° to 176°F |
Manuals
Operating Instructions: HPX10C.pdf
Power Supply Operating Instructions:
HPX10P.pdf
See the approximate charging times in the
table below. The times in the table are based on a fully
discharged battery. If the battery is only partially discharged, the
recharge time will be shorter.
|
Approximate Charge
Times |
| Battery Size |
Time to 90% |
Time to 100% |
| 2.2 Ah |
3.3 hours |
6.3 hours |
| 5.4 Ah |
8.1 hours |
11.1 hours |
| 7 Ah |
10.5 hours |
13.5 hours |
| 12 Ah |
18 hours |
21 hours |
| 18 Ah |
27 hours |
30 hours |
|
|
$44 |
In
Stock |
|
|
HPX30-12C200 |
Xenotronix Battery
Charger, 2A
Unique automatic battery charger charges and maintains 12 volt
batteries keeping them at full charge using float-mode monitoring.
Perfect for charging larger batteries. Great for maintaining large
batteries kept in storage.
Automatically switches from full charge to float-mode monitoring,
LEDs indicate: Power/Float, Fast Charge and Fault.
Reverse-polarity protection
Perfect for use with 12 Ah batteries. It is not recommended
for batteries less than 8 Ah.
|
Specifications |
|
Input Voltage and Frequency |
115 or 230 VAC
switchable +/- 10%,47- 63 Hz |
|
Current Limit (Imax) (+/- 5%) |
2A at 12VDC
1A at 24VDC |
| High
Rate Voltage |
14.70 +/- 0.30 VDC
at 12V
or 29.40 +/- 0.24 +/- 0.60 VDC at 24VDC |
| High
Rate Current (+/- 10%) |
Imax through
Imax/7.5 |
|
Float Rate Voltage |
13.68 +/- 0.12 VDC
at 12VDC
or 27.36 +/- 0.24 VDC at 24VDC |
|
Float Rate Current (+/- 10%) |
0 Imax through
Imax/7.5 |
|
Dimensions |
5.55" W x 2.90" x
3.6"D |
|
Weight |
3.8 lbs |
|
Temperature
Tolerances |
|
Operating
0° to 40° C or 32° to 104° F |
|
Storage
-40° to 80°C or -40° to 176° |
|
Manuals
Operating Instructions: HPX30C.pdf
Power Supply Operating Instructions:
HPX30P.pdf
See the approximate charging times in the
table below. The times in the table are based on a fully
discharged battery. If the battery is only partially discharged, the
recharge time will be shorter.
|
Approximate Charge
Times |
| Battery Size |
Time to 90% |
Time to 100% |
| 7 Ah |
4.2 hours |
7.2 hours |
| 12 Ah |
7.2 hours |
10.2 hours |
| 18 Ah |
10.8 hours |
13.8 hours |
|
 |
$99 |
In
Stock |
|
|
