CTEK (40-149) CTX Battery Sense

I’m fan of CTEK chargers and been using it for like 6 some years. I finally got two of this monitor after I order one first.I read kinda funky on setup and also how app works . I have kinda agree but adding 2 second unit it gave me little grief but I have both installed for awhile and never have issuesSometimes when you check one vehicle it may have an issues but usually close the app and access the 2nd vehicle works fine.There is a time no issues accessing both . App is pretty simple and definitely Bluetooth isn’t going reach far out in your house but easily read the data by the vehicle.You can expand the graph in app as well. So you can see in detail if you need it .Also while you are driving you can get good reading .

The battery sensor was a great companion product to the CTEK 250S as it allowed me to keep tabs on battery charge status - for a few months. It initially worked well: connected via Bluetooth and provided charging status on a regular basis. After an app software update earlier this year, the Bluetooth connection became unreliable. Recently, it no longer connects at all (tested on several batteries using several Bluetooth enabled phones). Customer service was slow to respond, didn't provide any useful feedback, and has not responded to my warranty claim. Not recommended.

Very easy to install , Very good features on app well detailed

This product is great and the manufacturer CTEK is very responsive to email questions. I work from home and the result is that my cars not driven for long distances much, usually short trips of 5 or 10mins for going to the gym or out to eat. This is bad for the car's battery and I bought this battery sense, along with the CTEK MUS 4.3 charger to make sure the charge level of my car batteries do not get to too low a level.A few things that you should know:1. In most US vehicles, the nut size for the battery post is 6mm. 6mm nuts are also listed as "M6" in places like Lowes. You will want to buy a couple of these 6mm nuts so that you can secure the positive and negative terminals of the Battery Sense to the battery without having to remove the exiting nuts on the battery posts. With the extra 6mm nuts, you can simply thread them over the extra length of the screw and "sandwich" the Battery Sense terminals to the post.2. The CTEK battery post does show voltage and temperature. They are not on by default however, you need to go into Settings and turn on those displays. They are shown when you tap on the battery and displays the details.One small quirk: When you install the App, it ask for the device ID, which is part of the alphanumeric displayed on the device itself. If you try to entire the entire ID shown on the label of the device, it won't work. You'll have to enter only part of it. Why would they do something like this is beyond me.

I own 2 CTEK Battery Sensors both in the same car just to be able to monitor my high-end car stereo system. One for the main engine battery & the 2nd one to monitor my Shuriken auxiliary battery installed in the trunk which powers my car stereo system. I have read the complaints and I have experienced many of the same problems as you all have. When it's working it's great when it's not, kind of sucks. So after experimenting with different options & company recommended fixes, what I found out was when your phone gets an automatic update or another app gets an update it may cause your Battery Sense to lose connection. What I did was just restart my phone within the Bluetooth range. After the restart, go to your Bluetooth settings on your phone turn off Bluetooth and then turn it on again. It should resync & update with the present time. If it gets jammed up again, repeat the process. The same goes for when you switch out or replace your battery. Here I thought just closing & then reopening the app would allow it to update, how wrong I was. I hope this helps.

The device itself is pretty easy to use. Connected to the car battery fine. Bluetooth connects fine to my Samsung S7.The accompanying phone app is very poor though. It often has a hard time connecting. It crashes frequently. It has screens that don't update sometimes. The readings on the graph are sometimes questionable and confusing. The chart shows a scale up to 100% (rather than actual voltage reading) and is often off the top of the graph so you can't see the measurements. After a complete battery recharge (or disconnecting the device) it seems confused and takes 24 hours or so to settle on what the readings really are. During that time I see a steep drop until the voltage readings seem to settle in. After that it looks accurate. It takes a reading every 5 minutes and the ups and downs correlate to the times the car is driven.We think we have a parasitic draw on our min-van and according to the graph the voltage drops about 0.1V between 2am and 7am every night. After a couple weeks the battery is dead (which prompted us to purchase this monitor). This matches up with my manual multimeter measurements.It works pretty well if you give it a day or two to get used to your battery. I wish the app was better and that you could see and export actual voltage measurements.

I have a BMW with a parasitic drain on the battery. This unit lets me check battery health by walking up to the car and I can decide whether to put it on the charger or not. This used to require me getting out my multi-meter and I usually left the battery access panels off, etc. My only request would be if it had a mode to show the actual live drain - that might help me diagnose which circuit was causing my problem by pulling fuses, etc. For it's intended purpose, though 100% awesome.

This is kinda cool to see what the charge state and voltage of your Battery is. I bought this battery senses because I use a CTEK charger. Unfortunately I wouldn’t recommend this product for a couple of reasons. The biggest being you can’t plug your CTEK charger into it to charge or maintain! Why wouldn’t have it? You already have to hook this to the battery. And the second is the app and capabilities could use a renovation.

Not worth 1 dollar. You have to actively initiate a connection. So if the battery is bad you do not get a warning. Only when you initiate a connection can you see if something is wrong. Much better products out there. I suggest ctek takes this product off the market. It is destroying your great reputation for great chargers.

Hardware simple para conectar a la batería, después de instalar la aplicación, que puedeSer más completo y con mejores gráficos, y estar conectado vía Bluetooth al dispositivo.(que a veces lleva algún tiempo), muestra con precisión los niveles de carga de la batería.A pesar de todo me gustó en general.

Le produit est très bien fini. Le montage est très facile et tout le nécessaire est livré. Une fois installé et branché, il faut télécharger l'application sur son smartphone et appairé l'ensemble. L'app permet de contrôler l'évolution de la charge de la batterie. Une jauge indique si une recharge est nécessaire. Il est possible de contrôler la température et la tension de la batterie. Un graphique permet de voir l'évolution de la charge de la batterie dans le temps. La seule chose que je n'ai pas réussi à faire fonctionner c'est la notification sur smartphone des changements d'état de la charge de la batterie (vert = ok; jaune = charger sous peu et rouge = chargement impératif). La liaison bluetooth entre le smartphone et le module est parfaite : en stabilité et en distance.

This has become an invaluable tool to let me know how my DC to DC charger and my solar panels are doing to maintain my deep cycle battery in my RV.

ヤリスハイブリッドZ令和3年式MXPH15、ギャラクシーS8+で使用中、2023年2月に購入約１年正常に動いています。新車購入後6カ月は通勤で使ってたので良かったのですが生活スタイルが変わり2週間位乗らないとバッテリー上がるようになりました。最近のハイブリッド車でバッテリー上がり急増してると言うことで自己防衛策としてバッテリー交換、ソーラーパネル搭載、バッテリーテスター購入等色々やりましたが、これと充電器あれば事足りた様です。シガーソケットに差すタイプのバッテリーチェッカーだと最近の車はドア開けただけでシステムが立ち上がり12.5Vから11.6Vと下がり正確な値がわからないのでスマホで常時電圧管理出来るこのタイプにしました。色々データ取りした結果1～2カ月ごとに充電器につなぐ又は2週間位で電圧が12V切る前にエンジン１時間位かけてやると大丈夫そうです。自宅駐車場から10～20メートル離れたシャッターの閉まった自室では少し不安定になりますが一応電圧確認出来ます。