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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.


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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 80C or -40 to 176F

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 80C 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
 

Cumulus Soaring, Inc.
Paul E. Remde

8661 Connelly Place
Savage, Minnesota 55378
USA


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