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Equus 3721 Battery and Charging System Monitor | 
| Brand: Equus
Category: Automotive Parts And Accessories
List Price: $25.57
Buy New: $12.95
You Save: $12.62 (49%)
New (3) from $12.95
Rating:  12 reviews
Sales Rank: 199
Media: Misc.
Shipping Weight (lbs): 1
Dimensions (in): 10 x 1 x 6.5
MPN: 3721
Model: 3721
UPC: 042173037216
EAN: 0042173037216
ASIN: B000EVWDU0
Availability: Usually ships in 1-2 business days
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| Features:
| • | Displays the condition of the battery and charging system | | • | Designed for 12-volt negative ground systems | | • | Protects the engine computer and 12-volt accessories from surges | | • | Easily plugs into a cigarette lighter or power receptacle | | • | Head pivots for easy viewing and angle adjustment |
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| Editorial Reviews:
Product Description
- Easily plugs into vehicles cigarette lighter or power receptacle to monitor battery and charging system voltage - Designed for 12-volt negative ground systems - LCD displays measured voltage with a bar graph to indicate battery charge level - Color-coded LEDs quickly identify batterys charge status - Head pivots for easy viewing angle adjustment
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| Customer Reviews: Read 7 more reviews...
 Battery & Charging System Monitor August 15, 2008
I have a similar device that has an analog display (a needle indicator) but decided I wanted one with a digital voltage readout so I bought one of these. I'm very pleased with it.
 Inflated shipping cost June 28, 2008
0 out of 2 found this review helpful
The shipping cost was doubled after I ordered this item. I will not order any products from this vendor again.
 Worked fine intially, but it didn't last long June 18, 2008
1 out of 2 found this review helpful
The numbers are clear even at night however after just 5 days of operation, the green back light died so I can't see anything at night. The meter still works so I can only use it during the day. I called their tech support and said that they'll replace this one if I return the faulty unit, however, I have to pay for the shipping! Since their product failed, I believe that they should be the one handling the return cost. Returning would already cost half the price I paid for this item.
Just what I was looking for April 28, 2008
1 out of 1 found this review helpful
Good display. Accurate reading. Flexible viewing screen. Adapts to battery monitor or charging mode.
12 Volt battery Monitor April 16, 2008
2 out of 2 found this review helpful
Seemingly just another auto gadget fortunately the Equus 3721 is more sophisticated than its ponderous description. A breeze to connect to any car's 12 Volt electrical system. Simply push into the lighter socket or an auxiliary power outlet now found in many newer vehicles.
With the engine running the instrument constantly displays battery condition with an LED light; amber when marginal, red if the battery is discharging. A green light indicates a correctly functioning electrical system. All is well with both battery and, most importantly, the alternator.
The Equus is also an accurate voltmeter. Digital read-outs give exact voltage in the electrical system. Potential alternator problems or a failing battery will be indicated by below normal voltages, plus an amber or red light. Extra information is a battery icon graphically showing total battery charge. Tending towards erratic read-outs, and therefore unreliability, it is not the unit's best feature.
Equus's instruction card is easy to understand. The unit is well made, sturdy, easy to connect and to transfer to any 12 volt system not having its own voltmeter. Also, as a supplemental monitor in an RV, or a bigger boat with a remote 12 Volt outlet in a sleeping area far from the main instrument panel, overall battery condition condition can be monitored while camping or at anchor.
Good value for money; very useful. From personal use, recommended.
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