Review: Timeusb 12V 50Ah LiFePO4 Battery

Timeusb 12V 50Ah LiFePO4 Battery

9.5

Power

8.5/10

Design

10.0/10

Build

10.0/10

Pros

  • Battery performed very well in the capacity test, as it scored just a little better than its stated 640Wh capacity
  • Can power 640W appliances continuously
  • Small, lightweight and affordable for a 640Wh LiFePO4 battery that will last for 4,000 or more charge cycles

Cons

  • Has a hard 640W powering limit
(Last Updated On: January 2, 2023)

LiFePO4 deep cycle batteries are the way to go if you’re looking for reliable, powerful, and low-priced portable power. Suppose you’re looking to power appliances from these types of batteries. In that case, it is often a better choice than most power stations because you tend to get more capacity and power for a low price, and capacity efficiency, in most cases, is better too. Also, the selection of batteries is vast, and the modularity regarding how you can use them is incredible.

I’m looking at this TimeUSB 50Ah LiFePO4 deep-cycle battery in this review. This battery has a lower capacity and size than the Redodo and AmpereTime 100Ah batteries I’ve reviewed. However, 50Ah batteries like this TimeUSB still have their place and are great as they’re even more affordable and feature quite a lot of power.

What’s in the Box

What you get in the box with this Timeusb 50Ah battery are four post bolts, two insulating covers, the manual, and a piece of paper that gives you bits of helpful of what to do and not to do with the battery. You don’t get a battery charger in the box, which is expected because batteries generally don’t come with a charger in the first place. Including four post bolts is great, and at this point, it should be the standard simply because having an extra two bolts just gave me peace of mind.

Power Capacity

This is a 12.8 Volt (V) 100 Amp Hour (Ah) battery, so to get the Watt Hour, you must multiply the Volts and the Amp Hour. So, in this case, this Timeusb 100Ah battery has a 640Wh capacity. This is a decent capacity, and when comparing it to 600Wh power stations that could be double or triple the price of this battery, it can start to make sense why you would choose this battery.

Also, another thing to note is that LiFePO4 battery cells are being used, which means the Timeusb battery can last up to or past 4,000 charge cycles. LiFePO4 batteries are quickly becoming the standard now, as they can last much longer, making them worth getting over Lead Acid or Lithium-Ion batteries, and even LiFePO4 power stations as those can be very expensive simply because they use LiFePO4 batteries.

In terms of how long you can use a 640Wh capacity, you can power a 640W appliance for 1 hour or a 1W appliance for 640 hours.

Capacity Test

For the capacity test, I used a MakerHawk load tester; I connected the negative and positive clamps to the battery and let the load tester run until the capacity for this Timeusb battery was fully depleted. I had the voltage of the load tester set to about 12.8V and the Amperage set to 10 Amps; after about 5 hours, I returned to the load test turned off and the battery at 0%.

I got a 52Ah reading, which gives a 102% efficiency on the Amp Hour side of this battery. I also got a 657Wh reading, which gives 102% efficiency for the Watt Hour side. So this Timeusb battery has the capacity it says it has and just a bit more. When using these batteries, it’s almost always best to use a direct connection because you can pull the most capacity possible. Using an inverter makes you lose quite a bit of capacity.

This Timeusb battery still scored pretty well, even in our inverter testing.

Output Charging

I used this battery by using a Renogy 2000W Pure Sine Wave inverter. Using a 2000W inverter with this Timeusb 50Ah battery is unnecessary. I recommend going with a 600W Pure Sine Wave inverter. However, for this testing, I wanted to see just how far I could push this Timeusb battery through some of the tests I ran.

Also, since this battery has a 640Wh capacity, it’s capable of outputting 640W continuously and inputting 640W to recharge.

Once I connected the terminal cable of the inverter to the Timeusb battery, I plugged in a Lasko heater to the Renogy inverter. I had an electricity monitor plugged into the inverter to measure the wattage output and Watt Hour capacity that the appliances were using. After turning on the heater and setting it to low, the output of the inverter was about 850W, which was considerably higher than the 640W continuous max output that this Timeusb 50Ah battery is capable of.

After running it at low for a few seconds, I set the heater to high to see what would happen, and surprisingly the output jumped to 1400W. The battery kept supplying power to the inverter to power the heater. I set a stopwatch, and after about 3 minutes and 40 seconds, the heater turned off because the 1400W was way too much for this Timeusb battery to handle. No surprises there, but it was still great to see the Timeusb battery trying to supply that much power.

Since the heater at high didn’t fare very well, and since the max output of this battery is 640W, I decided to run it at low to see how long it would run. I set the heater to low, which had an 850W output, set a stopwatch, and after about 4 minutes and 30 seconds, the heater shut off. So it seems this Timeusb battery has a relatively hard limit of 640W for power supply.

For the third test, I switched to powering a heat gun from the inverter, which allowed me to have better control over the wattage usage, so I set the heater to about a 630W output. With this test, I could constantly run the heat gun for about 40 minutes at 630W until the Timeusb battery was fully depleted. In conclusion, when it comes to powering appliances via an inverter using this Timeusb 50Ah battery, you have to power those within the 640W range.

Regarding the AC capacity efficiency when using an inverter with this battery, I could pull 530Wh, which translates into 82% efficiency for the capacity when using an inverter.

Recharging the Timeusb Battery

Recharging this Timeusb 50Ah battery is the same as recharging any other type of battery like this one; all you need is a battery charger, preferably a 14.6V charger with whichever Amperage you desire, and you will be able to recharge this battery.

I used an Ampere Time 14.6V / 10A battery charger, which worked perfectly. When I placed the negative and positive clamps of the battery charger on this Timeusb battery, it began recharging, which was indicated by the red light on the battery charger. Once the battery was fully recharged, the light on the charger turned green.

Since this is a lower-capacity battery, going with a 10 Amp battery charger is a good choice, as a full recharge from 0% to 100% will take about 5-6 hours. 10 Amp battery chargers are among the lowest priced.

Size and Weight

This 50Ah battery is considerably smaller than 100Ah batteries, with this Timeusb battery having a length of 7.7 inches, a width of 6.5 inches, and a height of 6.6 inches. The weight of the battery is 10 pounds. It’s much easier to pick this battery up and move around.

Functional Components

There isn’t much on the functional parts of this Timeusb battery or any other battery like this one. You’re going to use the post bolts to connect to your devices. In my case, I used the post bolts to screw down the terminal cables from the Renogy inverter I was using; once the terminal cables were connected, I could power the inverter and use it.

Structure and Material

The build is standard for this Timeusb battery, made of ABS plastic. However, it does have an IP65 water resistance rating that can withstand rain and splashes of water, but it cannot survive being placed into water.

Technical Build

For the technical build, this Timeusb battery has overcharge, overcurrent, short-circuit, high temperature, and all other protections that ensure it runs smoothly. For example, in my test with the Lasko heater, the battery stopped supplying power to the inverter because the current was likely too high, which was overcurrent protection in action.

Reliability

This Timeusb 50Ah battery is reliable if you find its 640Wh capacity and 640W continuous power output optimal for your needs. It’s definitely on the more mini side when it comes to deep cycle batteries, as there are batteries that have much more capacity and can supply more power than this one that Timeusb also sells. Of course, 50Ah batteries like this are a lot more affordable.

Summary:

Power:

This Timeusb battery has the 640Wh capacity that it says it has. This battery has a bit more capacity than it states. There is a hard limit to its 640W continuous power output as you can’t power appliances over its limit, as the battery will stop supplying power.

Design:

The size of this battery is small, and it’s lightweight in comparison to the next level of 100Ah batteries. It does come with four post bolts that can be easily screwed into the top of the battery.

Build:

The battery is made of standard ABS plastic, so it has an alright build and an IP65 water-resistance rating. On the technical build side, this battery has all sorts of protections to keep it from hurting itself.

Reliability:

50Ah batteries still have their place, and this one, with its 640Wh capacity and 640W supply, can fit most needs.

TimeUSB 12V 50Ah LiFePO4 Battery Specs
Usable capacity50Ah
Nominal Voltage12.8V
Max. Continuous Charge Current50A
Max. Continuous Discharge Current50A
Energy640Wh
Max. Continuous Load Power640W
Cycles≥4000 times
Waterproof LevelIP65
Battery Cell CompositionLithium-Phosphate
Terminal TypeM8
Weight10 lb
Dimension 6.53 x 7.79 x 6.69 inches

Conclusion:

The Timeusb 12V 50Ah LiFePO4 battery is a great choice if you find it to have enough power. 640Wh is a good amount of capacity; using LiFePO4 batteries ensures that you can use this battery for many years; the size and weight are very manageable, and the price is low.

Timeusb 12.8V 50Ah Pro LiFePO4 Battery, 15000+ Cycles Timeusb Battery with Grade A Battery Cells, Built-in 50A BMS, Deep Cycle Lithium Battery Perfect for Electric Wheelchair, Trolling Motor, Kayak
  • 【GRADE A BATTERY CELLS】Timeusb 12.8V 50Ah Pro LiFePO4 battery are made with grade A battery cells, which allows the battery to be cycled up to 4000 times and provide up to 10 years of lifespan. At 80% DOD the battery’s cycle times can reach over 6000 times. At 60% DOD the battery’s cycle times can reach over 15000 times. Reliable quality battery made by Timeusb.
  • 【COMPACT & LIGHT WEIGHT】Timeusb 12.8V 50Ah Pro battery weights only 11.02lbs as light as a adult cat suitable for carrying around. And the compact size of L7.79*W6.53*H6.69 inches, makes it suitable for all kinds of storage compartment in RV/Camper/Travel Trailer/Trolling Motors. With high energy density battery cells the 12.8V 50Ah Pro battery have the 57Wh/lb of energy density.
  • 【RELIABLE & SAFE BMS】Even with the smallest size within Timeusb product line, the 12.8V 50AhPro battery still have the full-size BMS that provides the 100% safety guarantee as the other models. 50A BMS provides five types of protections from: overcharging, over discharging, over current, short circuit, and high-temperature. The BMS will cut-off when environmental temperature is above 60°C/140°F.
  • 【EXPANDABLE CAPACITY】Flexible and expandable battery connections allows the maximum battery connections of 4 in series and 4 in parallel. Max.10.24kWh and Max. 10.24kW for 51.2V 200Ah battery system with maximum of 16 units of 12.8V 50Ah Pro batteries. Flexible battery system suits for all kinds of different storage requirements. Fully utilize the space and energy, suitable for solar system and off-gird battery system too.
  • 【EFFICIENT DELIEVERY & SERVICE】: Timeusb provides customers with a responsive and professional customer service team that provides targeted battery solutions of question receipt. Given Timeusb a highly effective after-sales and delivery team, our customers in the United States can receive Timeusb LiFePO4 Batteries within 2-7 working days.
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