Is the rechargeable battery user replaceable?

It should be; I've not had to replace mine yet, so I have not opened the sensors. You'll need to remove the screws to open the body and then see what battery is being used. If the battery leads are soldered to the battery, then you might want to find a friend who works with electronics. It's not hard but most people don't have a soldering iron at home or work. Small wire requires small solder wire. Flux/rosin is useful. A small thick paint brush for cleaning of residual flux is recommended for prolonging battery life by protecting from corrosion due to flux left on the battery terminals. Flux - is contained in the solder wire but additional DROP of flux/rosin is useful because that is what carries and generates the heat transfer. With soldering, you want quick heat and a small amount of solder. Too much heat for too long will melt plastic, parts, components and the insulation of the wire (unless it's Teflon, and I'm pretty sure they probably don't use that because it's more expensive). If you're planning to replace with a new purchase, then you have nothing to lose by practicing on the existing sensor first. If you succeed, then you have an extra sensor handy and can replace batteries on anything in the future. I learned to solder at NASA. We build our own rockets, payloads and battery packs from the bottom up... so it eventually hit me that I'm more than qualified to replace batteries, upgrade batteries, or even build new battery packs for my tools. Everything works just fine. 😊 Don't be intimidated by any project, especially if you're about to throw something, that is NOT biodegradable, into a landfill, anyway. It's worth trying to learn on; if not for yourself, then for your children OR your local high school OR community college. Technical schools and electronic engineering courses rarely have such simple projects available, yet I can promise you that these would be a worthwhile training tool for students. That being said, do NOT bother saving clearly dead TVs, etc because the cost of diagnosing the problem will cost more than the repairs, which will cost more than a new TV. (Samsung TVs that work fine until their screen fails to come on, but you can still hear the audio, is an example of a rare exception to that statement; they have a history of poor capacitors, which can easily be replaced for pennies in parts.)

Charging tHow long to charge and when is it fully chargedhe remote sensor

Charging takes just a few hours in my experience. The light on the device turns green when the charging is complete.

Does tx-4 work on the tp-65a?

Yes, it is the remove sensor recommended by the manufacturer.

I want to use this in my crawlspace. Can I leave it plugged in? I don't want to keep crawling under the house to change batteries.

To be honest, I do not see why not, the only issue might be the wall plug adapter might not like being in the heat of the attic, since it is a mini voltage step down transformer they do have issues with high heat environments. That being said if you can find a longer cable for charging it might work for you. You might see if you can ask the manufacturer of the unit for guidance.

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Reviews

D**S

Great customer service

I originally received a faulty unit. I wrote a review about it not working. The seller sent a message that they were replacing it ! I received the replacement a couple of days later! It works great! Pretty darn good customer service!

15.10.2022

P**L

Good product

Have been using my original transmitter and am very happy with it. I bought a second one to have two units to compare the front and back of my property. The reason I gave it 4 stars is that I’m having problems getting both to work at the same time.

8.04.2022

E**E

I use it to monitor the temp in baby's room

I purchased this remote transponder to add to what I already have. I have a little girl and wanted to monitor the temperature in her room when she is sleeping at night. I already had the receiver which has a nice screen and yellow light for viewing at night time. This remote transponder works great. It paired up easily. FYI: if you have more than one remote transponder, you have to remove the pannel on the back and select which channel you want to use. My receiver will accept a total of 3 channels, but you have to individually tell each remote transponder what channel it is going to be. I had to call Thermo Pro customer service to find that out, and it was such an easy fix. On a side note, Thermo Pro customer service was quick and very friendly.

28.05.2020

H**S

Batteries wont last

My experience with TWO of the remote sensors/senders is that the battery life is poor. Not in the battery run time, but the time to where the batteries will not take a full charge. Gets worse and worse. Any they did not have that many charge cycles on them. Won't be ordering another remote to solve this issue.

8.07.2023

K**M

Lasted about 3 years

In August 2019, I purchased the ThermoPro TP63B, which came with one transmitter and then bought one additional transmitter, so I could have one on each side (North and South facing) of my house. It's now September 2022. They have lasted fairly well, I suppose. The transmitters have both needed more frequent charging over the last year or so. However, one of them will no longer recharge.It's been an overall reliable and accurate system during the past 3 years, so I am just going to buy a couple more of these transmitters to replace the one that "died" and have a spare for when the other one stops working.

24.09.2022

Package Dimensions	9.3 x 8.1 x 3.3 cm; 109 Grams
Part number	TX-4
Material type	Lithium
Power source type	Lithium Battery
Manufacturer	ThermoPro
Manufacturer reference	TX-4

ThermoPro TX-4 with 433MHz Frequency Fitting Waterproof Transmitter Additional Outdoor Sensor for All 433MHz Indoor Outdoor Thermometer Temperature and Humidity Monitor

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