The results with these types of pumps seems to vary wildly. I have one that I bought 11 YEARS ago from Amazon for $18 that still works fine and is still on the original set of D-cell batteries. Crazy for sure. It only gets used a few times a year for sucking fuel out of mower tanks which may be why it has lasted so long.

I recently bought a stick-style Tera-Pump with a longer hose but I have not yet had a chance to try it. I will use it for pumping fuel out of 5-gallon jugs into my bulk tank. We'll see how that goes.

 

I have a Tera pump also, used it 6 - 7 times with 5 gallon jugs so far, no problems.
Bought the type with adapters to fit various jugs.
Uses 4 AA batteries, supposedly they will last at least 100 gallons worth of pumping.
Empties 5 gallons in 2 - 2.5 minutes.
$76 with tax, Home Depot, a little pricey, but saves the back, longevity wise we'll see.

 

I just ordered a Tera pump online. Still on my first set of rechargeable batteries. Have pumped about a dozen 2 gallon containers of diesel. That's all the B has used in over 60 hours.

 

I'm not sure which pump you're talking about. Is this the one?

Battery-Operated Liquid Transfer Pump

Amazing deals on this Transfer Pump Battery Operated at Harbor Freight. Quality tools & low prices.

www.harborfreight.com

I haven't tried one of those, but I've been pretty happy with this one:

Amazon.com: TERA PUMP TRFA01-XL Battery Powered Overfill Protection Fuel Transfer Pump w/Gas Can & Racing Can Jug Adapters, 4.25ft Hose, 2.3 GPM for Gas Diesel E15 E85 Fuels (Gas Can Not Included) : Automotive

Buy TERA PUMP TRFA01-XL Battery Powered Overfill Protection Fuel Transfer Pump w/Gas Can & Racing Can Jug Adapters, 4.25ft Hose, 2.3 GPM for Gas Diesel E15 E85 Fuels (Gas Can Not Included): Electric Fuel Pumps - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

I particularly like the longer hose and the fact that it will shut off automatically when the tank is full.

Best,

 

Mine looks similar to the straight one you show in the first link but with a tad longer hose and clips on the end to hold it to whatever you're pumping into. Auto shutoff.

 

I did have a chuckle when I read the title to this thread and the words “failing” and “Harbor Freight” were used in the same sentence. 😆

I know there are some deals there, and I’m an occasional customer as well. Just had a laugh and kinda said to myself, you get what you pay for. I rarely buy anything from HF with no other expectations other than one use.🤷🏻‍♂️

 

They discontinued the one product that wasn't a throw away, the aluminum step stool!

The battery load tester is a pretty cheap throw together of a stamped metal basket, a cheapie resistance/heating element and a cheapie electric meter. Probably overpriced at 20 bucks but still cheaper than most other chinesium testers.

I always though the rule of thumb with HF is to not expect an inexpensive motor to last thus the electric "things" are throwaways.

 

I use mine for gas and diesel and drain it after each use. Mostly for gas.

I stick a piece of tygon tube on to extend the hose.

The pump bodies all look pretty similar. Not sure what if any difference there is in the different models. I ordered a replacement off Amazon for $10 that looks identical to the HF unit. One of the previous pumps I bought at Walmart.

 

I’ve been using a couple of the Harbor Freight transfer pumps for a number of years now with no problems.
Use one pump for gas .. the other one for diesel… Still haven’t had to change out the batteries since I bought the pumps new …