These will save you lots of money by making sure you know when the battery is running out of juice. I have one on my quad and the other is on my ground station. There are a few problems however: both of the alarms I got report a full battery as being 12.4V as opposed to 12.6V. Both also report differing cell voltages for example alarm1 shows voltages as being Cell1: 374V Cell2: 379 Cell3: 368 and alarm2 as Cell1: 371V Cell2: 371 Cell3: 388V while my imax charger claims the cells are in fact balanced equally. So these aren't terribly accurate. I digress; these are for alarming you when to land and that they do well (mostly). You can set the alarm voltage with the button on the alarm from 27V to 37V (I recommend setting it to 33V if your alarms also show full voltage as 124V.) Mine will sometimes remember the voltage I set and sometimes forget it when I switch batteries. Also I managed to ruin one battery because the alarm wouldn't beep even at 28V even though I had it set to beep at 33V. So don't trust these blindly also have a timed alarm running (phone watch timer etc.) in addition. For the price I can recommend them as a starter solution but having telemetry on your TX or OSD would be much more convenient.

These will save you lots of money by making sure you know when the battery is running out of juice. I have one on my quad and the other is on my ground station. There are a few problems however: both of the alarms I got report a full battery as being 12.4V as opposed to 12.6V. Both also report differing cell voltages for example alarm1 shows voltages as being Cell1: 374V Cell2: 379 Cell3: 368 and alarm2 as Cell1: 371V Cell2: 371 Cell3: 388V while my imax charger claims the cells are in fact balanced equally. So these aren't terribly accurate. I digress; these are for alarming you when to land and that they do well (mostly). You can set the alarm voltage with the button on the alarm from 27V to 37V (I recommend setting it to 33V if your alarms also show full voltage as 124V.) Mine will sometimes remember the voltage I set and sometimes forget it when I switch batteries. Also I managed to ruin one battery because the alarm wouldn't beep even at 28V even though I had it set to beep at 33V. So don't trust these blindly also have a timed alarm running (phone watch timer etc.) in addition. For the price I can recommend them as a starter solution but having telemetry on your TX or OSD would be much more convenient.

These will save you lots of money by making sure you know when the battery is running out of juice. I have one on my quad and the other is on my ground station. There are a few problems however: both of the alarms I got report a full battery as being 12.4V as opposed to 12.6V. Both also report differing cell voltages for example alarm1 shows voltages as being Cell1: 374V Cell2: 379 Cell3: 368 and alarm2 as Cell1: 371V Cell2: 371 Cell3: 388V while my imax charger claims the cells are in fact balanced equally. So these aren't terribly accurate. I digress; these are for alarming you when to land and that they do well (mostly). You can set the alarm voltage with the button on the alarm from 27V to 37V (I recommend setting it to 33V if your alarms also show full voltage as 124V.) Mine will sometimes remember the voltage I set and sometimes forget it when I switch batteries. Also I managed to ruin one battery because the alarm wouldn't beep even at 28V even though I had it set to beep at 33V. So don't trust these blindly also have a timed alarm running (phone watch timer etc.) in addition. For the price I can recommend them as a starter solution but having telemetry on your TX or OSD would be much more convenient.

tardas en darte cuenta que tener un comprobador de baterías es imprescindible si quieres que tus bateriás lipos duren un mínimo tiempo. este modelo además lo puedes programar para que te avise en pleno vuelo del estado de la batería. el único pero es que aguanta muy mal los golpes y que podría ser más pequeño, menos aparatoso.

tardas en darte cuenta que tener un comprobador de baterías es imprescindible si quieres que tus bateriás lipos duren un mínimo tiempo. este modelo además lo puedes programar para que te avise en pleno vuelo del estado de la batería. el único pero es que aguanta muy mal los golpes y que podría ser más pequeño, menos aparatoso.

tardas en darte cuenta que tener un comprobador de baterías es imprescindible si quieres que tus bateriás lipos duren un mínimo tiempo. este modelo además lo puedes programar para que te avise en pleno vuelo del estado de la batería. el único pero es que aguanta muy mal los golpes y que podría ser más pequeño, menos aparatoso.

It's as described. Nevertheless it's a little big and heavy (10g) so it might not the perfect tool for 1s quadcopter. Parcel was well protected and there ain't no packaging : that's so great not to have to pay for a packaging. Thanks BG,

It's as described. Nevertheless it's a little big and heavy (10g) so it might not the perfect tool for 1s quadcopter. Parcel was well protected and there ain't no packaging : that's so great not to have to pay for a packaging. Thanks BG,

It's as described. Nevertheless it's a little big and heavy (10g) so it might not the perfect tool for 1s quadcopter. Parcel was well protected and there ain't no packaging : that's so great not to have to pay for a packaging. Thanks BG,

If you own quadcopters or any RC machines that does not have a "low voltage" alarm, then these testers are a must...I needed a couple of extras and BANGGOOD delivered...they work as expected and if I need more I know where to buy them...watch for flash sales, and specials BANGGOOD offers and jump on these testers...

If you own quadcopters or any RC machines that does not have a "low voltage" alarm, then these testers are a must...I needed a couple of extras and BANGGOOD delivered...they work as expected and if I need more I know where to buy them...watch for flash sales, and specials BANGGOOD offers and jump on these testers...

If you own quadcopters or any RC machines that does not have a "low voltage" alarm, then these testers are a must...I needed a couple of extras and BANGGOOD delivered...they work as expected and if I need more I know where to buy them...watch for flash sales, and specials BANGGOOD offers and jump on these testers...

If you are in a hobby that has anything to do with lipo's this is a must have, this has saved my quad on countless occasions, but the ones I ordered this time one was missing the button on the top so of course i can't set the alarm so I have to contact banggood about it , but other then that there great and pretty durable definitely worth the couple dollars

If you are in a hobby that has anything to do with lipo's this is a must have, this has saved my quad on countless occasions, but the ones I ordered this time one was missing the button on the top so of course i can't set the alarm so I have to contact banggood about it , but other then that there great and pretty durable definitely worth the couple dollars

If you are in a hobby that has anything to do with lipo's this is a must have, this has saved my quad on countless occasions, but the ones I ordered this time one was missing the button on the top so of course i can't set the alarm so I have to contact banggood about it , but other then that there great and pretty durable definitely worth the couple dollars

Ezek a riasztók Isten küldött minden RC rajongó, szinte semmit súlyt, így nem növelik a modell. Nagyon hangos sípszó hallható nagyon nagy távolságból, kiváló rc síkok és helikopterek, Én is használja őket, hogy tartsa a szemét a tárolt akkumulátorok, mert azt mondja, a feszültség minden cellában. Kiváló termék, mint mindig, nagyon gyors szállítás, nagyon olcsó és kiváló termék. Köszönjük, hogy a másik kiváló vásárlást.

These alarms are a God sent for every rc enthusiast, they weight almost nothing, so they won't add to your model. Very loud beep can be heard from a very long distance, excellent for rc planes and helicopters, I also use them to keep an eye on stored batteries as it tells you the voltage on each cell. Excellent product from Banggood as always, very fast delivery, very cheap and excellent product. Thank you Banggood for another excellent purchase.

Ezek a riasztók Isten küldött minden RC rajongó, szinte semmit súlyt, így nem növelik a modell. Nagyon hangos sípszó hallható nagyon nagy távolságból, kiváló rc síkok és helikopterek, Én is használja őket, hogy tartsa a szemét a tárolt akkumulátorok, mert azt mondja, a feszültség minden cellában. Kiváló termék, mint mindig, nagyon gyors szállítás, nagyon olcsó és kiváló termék. Köszönjük, hogy a másik kiváló vásárlást.

These small devices come in quite handy in order to check your 1S-8S batteries. They show the voltage of the overall battery, as well as the voltage of the single cells. Additionally the device also allows to set a quite loud low voltage alarm. Please see my 2nd attached picture for more details and a compact description about what the device offers.

These small devices come in quite handy in order to check your 1S-8S batteries. They show the voltage of the overall battery, as well as the voltage of the single cells. Additionally the device also allows to set a quite loud low voltage alarm. Please see my 2nd attached picture for more details and a compact description about what the device offers.

These small devices come in quite handy in order to check your 1S-8S batteries. They show the voltage of the overall battery, as well as the voltage of the single cells. Additionally the device also allows to set a quite loud low voltage alarm. Please see my 2nd attached picture for more details and a compact description about what the device offers.

Here we have the must need for every fly guy and gal when it comes to DIY.. If your Quad has no feedback for your battery voltage then you should just take that $30 pack and throw it into a recycling bin right now. The key here is to save your investments. This lil guy will help do it. No worry's if you plug it in backwards its not going to fry if you catch it. The unit will beep on startup and display in less than 1 second and cycle trough each cell then read All the cells for the final voltage. So you can see if a cell is bad or under voltage etc. On the back its clearly described on each pole and your + and - alignment. It is best to add one to each battery permanently or on your quad with an extended wire if needed to plug it in. These work well on the fly and do not need to be integrated. ITS LOUD..

Here we have the must need for every fly guy and gal when it comes to DIY.. If your Quad has no feedback for your battery voltage then you should just take that $30 pack and throw it into a recycling bin right now. The key here is to save your investments. This lil guy will help do it. No worry's if you plug it in backwards its not going to fry if you catch it. The unit will beep on startup and display in less than 1 second and cycle trough each cell then read All the cells for the final voltage. So you can see if a cell is bad or under voltage etc. On the back its clearly described on each pole and your + and - alignment. It is best to add one to each battery permanently or on your quad with an extended wire if needed to plug it in. These work well on the fly and do not need to be integrated. ITS LOUD..

Here we have the must need for every fly guy and gal when it comes to DIY.. If your Quad has no feedback for your battery voltage then you should just take that $30 pack and throw it into a recycling bin right now. The key here is to save your investments. This lil guy will help do it. No worry's if you plug it in backwards its not going to fry if you catch it. The unit will beep on startup and display in less than 1 second and cycle trough each cell then read All the cells for the final voltage. So you can see if a cell is bad or under voltage etc. On the back its clearly described on each pole and your + and - alignment. It is best to add one to each battery permanently or on your quad with an extended wire if needed to plug it in. These work well on the fly and do not need to be integrated. ITS LOUD..

Useful, small and light weight battery voltage tester. When you connect this thing to LiPo battery balance port it starts with very loud sound signal and shows number of cells detected. After that it starts to cycle thru each cell voltage status, and finaly total battery voltage. Desired alarm voltage is very easy to set, you just need to repeatedly push small button on top of the unit and it changes values from 2.70 to 3.70 volts. If you left it on OFF alarm is disabled. Useful for in flight battery alarm or when you want fast check battery voltages. Alarm tone is very loud. Connected tester https://youtu.be/n7lq0NduZ_4 Alarm setting: https://youtu.be/DMy7T1kFlJ4

Useful, small and light weight battery voltage tester. When you connect this thing to LiPo battery balance port it starts with very loud sound signal and shows number of cells detected. After that it starts to cycle thru each cell voltage status, and finaly total battery voltage. Desired alarm voltage is very easy to set, you just need to repeatedly push small button on top of the unit and it changes values from 2.70 to 3.70 volts. If you left it on OFF alarm is disabled. Useful for in flight battery alarm or when you want fast check battery voltages. Alarm tone is very loud. Connected tester https://youtu.be/n7lq0NduZ_4 Alarm setting: https://youtu.be/DMy7T1kFlJ4

Useful, small and light weight battery voltage tester. When you connect this thing to LiPo battery balance port it starts with very loud sound signal and shows number of cells detected. After that it starts to cycle thru each cell voltage status, and finaly total battery voltage. Desired alarm voltage is very easy to set, you just need to repeatedly push small button on top of the unit and it changes values from 2.70 to 3.70 volts. If you left it on OFF alarm is disabled. Useful for in flight battery alarm or when you want fast check battery voltages. Alarm tone is very loud. Connected tester https://youtu.be/n7lq0NduZ_4 Alarm setting: https://youtu.be/DMy7T1kFlJ4

На индикаторе показывает последовательно all общее напряжение, номер банки и напряжения 1s-8s на восьми банках. При просадке или снижения напряжения ниже критического подается звуковой сигнал. Ссылка на видео: https://youtu.be/SgQx-JQgHXA

На индикаторе показывает последовательно all общее напряжение, номер банки и напряжения 1s-8s на восьми банках. При просадке или снижения напряжения ниже критического подается звуковой сигнал. Ссылка на видео: https://youtu.be/SgQx-JQgHXA

На индикаторе показывает последовательно all общее напряжение, номер банки и напряжения 1s-8s на восьми банках. При просадке или снижения напряжения ниже критического подается звуковой сигнал. Ссылка на видео: https://youtu.be/SgQx-JQgHXA