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(376 ratings)
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AiLi Voltmeter Ammeter Voltage Current Meter Voltmeter Ammeter 100V 350A Caravan RV Motorhome 999 AH

4.4 4.4 out of 5 stars 2,123 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Electrical Battery Testers by HENGSHAN

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8-80V,0-350A

Purchase options and add-ons

Brand HENGSHAN
Material Plastic
Item Weight 400 Grams

About this item

  • Read your battery bank like a fuel gauge, battery status at a glance.
  • Combines many functions in one, these information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.
  • State of Charge (%),The remaining battery capacity ( up to 999AH). Charge and discharge current (A), Voltage (V).
  • Data storage - designed to automatically store the last testing data when system shuts off
  • Universal Battery Monitor- voltage range 8V-100V and up to 350A
See more product details

Customer ratings by feature

Easy to install
4.4 4.4
Value for money
4.3 4.3
Easy to read
4.3 4.3
Easy to use
4.2 4.2

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AiLi

AiLi Voltmeter Ammeter Voltage Current Meter Voltmeter Ammeter 100V 350A Caravan RV Motorhome 999 AH


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Product Description

This Battery Monitor is designed to monitor performance most kind of battery systems with capacities of up to 999 Amp hours.
Read your battery bank like a fuel gauge.
Battery Status at a glance.
Combines many functions in one, these information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.
State of Charge (%),The remaining battery capacity (AH).
Charge and discharge current (A), Voltage (V).
Charging status indicator, looks like a smartphone.
It is suitable for mobile and portable equipments, e-bike, balance cars, cleaning machines, instruments, ups and so on.
This item is suitable for lithium batteries, lithium iron phosphate batteries,
lead-acid batteries and nickel-metal hydride batteries which working voltage is from 8V to 100V.
Have memory function.
Doesn't require isolated power, self-powered 8-80V.
It is very easy to install.

Specifications
Working voltag: 8.0-100.0 V
Current range: -350~+350 amps
Capacity range: 0-999 ampere-hour
Working consumption: 10.0-12.0 mA
Standby consumption: 0.5-0.6 mA
Sleep consumption: 50-60 uA
Voltage accuracy: ± 1.0 %
Current accuracy: ± 1.0 %
Capacity accuracy: ± 1.0 %
Preset capacity value: 0.1-999 Ah
Temperature range: 0-35℃
Weight: 400g
Size: ø59mm*20 mm
Mounting hole: diameter 54mm

The auction includes
1 x Battery monitor
1 x Current sampler
1 x 2 meters long cable
1 x English operation manual

Looking for specific info?

Important information

Bulb Voltage

100 volts

Customer reviews

4.4 out of 5 stars
4.4 out of 5
2,123 global ratings

Customers say

Customers like the ease of installation, performance, value, and accuracy of the battery meter. For example, they mention it works great, it's inexpensive, and provides the most accurate method for measuring capacity. That said, opinions are mixed on the quality, battery level, and battery capacity.

AI-generated from the text of customer reviews

165 customers mention121 positive44 negative

Customers find the installation of the electromechanical gauge to be easy. They mention that the directions are straight forward, and the operation is really simple. They also appreciate the mounting hardware, shunt, cables, and instructions. The acrylic mount makes it easy to screw to anything, and it's refreshing to operate without gimmicks.

"...Nice heavy duty acrylic base and super heavy hardware. Simple operation is refreshing in this overly gimmicky app-inundated world we live in...." Read more

"...Operation is really simple. I walked my wife through setting up the SOC over the phone, and it took less than 2 seconds to do it...." Read more

"...This current meter was easy to install, and if you follow the directions carefully, is easy to calibrate to the specific capacity of your battery...." Read more

"...somewhere inside of a RV where it will stay dry its a bit more challenging to install unless you do some soldering...." Read more

154 customers mention112 positive42 negative

Customers like the performance of the electromechanical gauge. They say it works well, the install and set up is straightforward, and works from the get-go. The meter works well and is accurate, and it's excellent value for the money. The function buttons work reliably, and the display options are simple. Overall, most are happy with the performance and functionality of the product.

"Worked perfectly right out of the box. Nice heavy duty acrylic base and super heavy hardware...." Read more

"...It was a fraction of the price of comparable items, and works just as is stated. Operation is really simple...." Read more

"...The meter is flush mounted and of very low profile. The function buttons work reliably and while the display options are quite simple, the..." Read more

"...When the backlight goes off it sometimes does not come back on until a button is pressed. The backlight flashes slowly when charging...." Read more

113 customers mention109 positive4 negative

Customers appreciate the value of the battery monitoring tool. They mention it has a lot of capability for the price, and is simple and inexpensive. Some say the performance for price is a bullseye.

"...It was a fraction of the price of comparable items, and works just as is stated. Operation is really simple...." Read more

"I love the product, its very accurate, good value for the money and for the most part easy to install...." Read more

"...While it lacks Bluetooth connectivity, it is offered at a price point that makes it an exceptional bargain...." Read more

"Got this monitor for my Chevy Roadtrek RV based on its simplicity and price. I wasn't disappointed a bit...." Read more

88 customers mention67 positive21 negative

Customers like the accuracy of the electromechanical gauge. They mention that it's very accurate, has no difference in measuring accuracy with regards to 350A or 100A shunt, and is impressed with the voltage calibration accuracy. It provides the most accurate method for measuring capacity, and the readings are accurate when compared to a volt meter. It also tracks current amps and total amp hours.

"I love the product, its very accurate, good value for the money and for the most part easy to install...." Read more

"I love this thing! Very precise and a very good value for the price! Plenty of info on youtube on how to set it up and use it...." Read more

"...It is very accurate, easy to read and has a super minimal draw. The LED back light makes it easy to read in darker environments...." Read more

"...flashing and now in addition to these things happening the amps reading is jumping all over the place with no load on the battery at all...." Read more

124 customers mention86 positive38 negative

Customers have mixed opinions about the quality of the electromechanical gauge. Some mention that the product is high quality, excellent, and has a lot of capability for the price. However, others say that it is not very well made, the parts feel a bit cheap, and that it has melted partially over the screw hole.

"...Nice heavy duty acrylic base and super heavy hardware. Simple operation is refreshing in this overly gimmicky app-inundated world we live in...." Read more

"...The shunt is well made and appears to be of durable construction (I chose the 350A version). The meter is flush mounted and of very low profile...." Read more

"...Some of the parts feel a bit cheap but as long as you give special care to it I don’t see any reason why it wouldn’t last – hopefully...." Read more

"...This is a great device for monitoring you batteries. You won't be disappointed." Read more

43 customers mention14 positive29 negative

Customers are mixed about the battery level. Some mention that it provides an accurate reading of battery charge level, while others say that it consistently resets itself to 0% if not used for more than a day. Some customers also say that the meter is only able to do a battery capacity test with a fully charged battery.

"...Seems accurate for current and voltage. I have found it resets shortly after repowering though...." Read more

"...This one can monitor up to a 100A current. This generator is 60Ah with 1000W inverter and DC connections...." Read more

"...counts down percentage just fine when discharging, but does not count up when charging...." Read more

"...1. Capacity is limited to 100Ah. That's not enough for most any battery. I suggest you just use battery votage to determine state of charge...." Read more

38 customers mention13 positive25 negative

Customers have mixed opinions about the battery capacity of the meter. Some mention that it tracks very well voltage, current, and capacity, while others say that it loses the percentage of charge and the total AH numbers.

"...The lead acid batteries has basically died after 2 years and rather than do a simple swap we upgraded to Lithium...." Read more

"...The display shows voltage, amperage capacity and current draw, as well as battery level in percent...." Read more

"...There is no load or charge to the battery and the monitor is showing the up (charge) arrow and the back-light was flashing and now in addition to..." Read more

"...It reads in amps, NOT Watts, so you end up multiplying amps by volts to get watt usage. It's my biggest complaint with this meter...." Read more

41 customers mention7 positive34 negative

Customers are dissatisfied with the size of the electromechanical gauge. They mention that the cable is only 6 feet long, which is too short for most applications. They also say the wiring is a little bulky and the connection is annoying with the small wire.

"...Yes, cord is too short. Ended up being just enough for my application. You can extend it without too much trouble...." Read more

"...having to solder the wires back together due to the odd shaped rectangular connection fitting...." Read more

"...2. The connecting cable they give you from the shunt to the monitor is much too short. I had to slice in a 5-conductor cable of my own making...." Read more

"...Attaching the small wire can be a delicate operation...." Read more

Very good value
5 Stars
Very good value
I love this thing! Very precise and a very good value for the price! Plenty of info on youtube on how to set it up and use it.I recommend making sure your battery is disconnected before connecting the cables to this. The back of the circuit board is exposed and very close to the lug bolts. If you accidentally touch the back of the circuit board with a powered cable lug, the unit will be toast. Just to be safe I put a small piece of electrical tape on the back of the circuit board. I think it would be a good idea for the manufacturer to add something like this at the factory to prevent people from accidentally shorting and killing the circuit board. This is a great device for monitoring you batteries. You won't be disappointed.
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Top reviews from the United States

Reviewed in the United States on February 19, 2024
Size: 8-80V,0-350AVerified Purchase
One person found this helpful
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Reviewed in the United States on January 11, 2024
Size: 8-80V,0-350AVerified Purchase
2 people found this helpful
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Reviewed in the United States on December 10, 2019
Size: 8-80V,0-100AVerified Purchase
6 people found this helpful
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Reviewed in the United States on May 3, 2021
Size: 8-80V,0-350AVerified Purchase
One person found this helpful
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Reviewed in the United States on June 14, 2021
Size: 8-80V,0-100AVerified Purchase
4 people found this helpful
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Reviewed in the United States on December 15, 2023
Size: 8-80V,0-350AVerified Purchase
Customer image
5.0 out of 5 stars Very good value
Reviewed in the United States on December 15, 2023
I love this thing! Very precise and a very good value for the price! Plenty of info on youtube on how to set it up and use it.
I recommend making sure your battery is disconnected before connecting the cables to this. The back of the circuit board is exposed and very close to the lug bolts. If you accidentally touch the back of the circuit board with a powered cable lug, the unit will be toast. Just to be safe I put a small piece of electrical tape on the back of the circuit board. I think it would be a good idea for the manufacturer to add something like this at the factory to prevent people from accidentally shorting and killing the circuit board. This is a great device for monitoring you batteries. You won't be disappointed.
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Customer image
Customer image
One person found this helpful
Report

Top reviews from other countries

Translate all reviews to English
Amazon Customer
5.0 out of 5 stars Top notch Li ion battery capacity monitor
Reviewed in Canada on December 11, 2023
Size: 8-80V,0-350AVerified Purchase
Nigel Wells
5.0 out of 5 stars Good Value
Reviewed in Canada on August 4, 2023
Size: 8-80V,0-100AVerified Purchase
francisco
4.0 out of 5 stars Não faz uma leitura automática
Reviewed in Spain on August 24, 2023
Size: 8-80V,0-350AVerified Purchase
Javi
5.0 out of 5 stars Muy buen funcionamiento
Reviewed in Spain on May 8, 2023
Size: 8-80V,0-100AVerified Purchase
Client d'Amazon
5.0 out of 5 stars Bien. Bon appareil
Reviewed in France on October 8, 2022
Size: 8-80V,0-100AVerified Purchase