9 Best
Variable Voltage Batteries
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Product Highlights- 【lcd display】the lcd can display voltage input and output, output current, output power, output capacity, and output time. the input terminal is protected against reverse connection, and the reverse connection will not burn.
- 【high performance】the output terminal is anti-backflow, and there is no need to add an anti-backflow diode when charging the battery. the module can be set to turn on/off by default, with low output ripple and π-type filtering.
- 【vital parameters】numerical control adjustment is accurate and fast, can increase and decrease voltage, output voltage can be adjusted arbitrarily from 0.5-30v, and limit current can be adjusted arbitrarily from 0-4a.
- 【protection】after the module's working parameters exceed the protection threshold, the output will be automatically turned off, the heat sink is thickened, and the heat dissipation effect is good.
- 【good service】please confirm before you place an order. if you have any questions, please contact us. we will do everything possible to solve your problems efficiently.
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Product Highlights
- 【upgraded version power supply】built-in protruding rotatable button for adjusting the voltage suitable for your device ,the led displays real-time voltage,which helps you control real-time condition of charging. the knob can be adjusted more evenly, and it can reach 13v ~ 14v by rotating 50%. increase the off gear to turn off the power without pulling the plug.
- 【widely used】the 72w all-in-one multipurpose adapter fit for most ac/dc home appliances. can be perfect for wireless router, adsl cats, hub, security cameras, wifi camera, dvd player, audio/ video device, 3d printer, cctv system, lcd monitor, bluetooth speaker, sound bar, digital piano, portable keyboard, ir illuminator, led strip light and other household / portable de...
- 【adjustable voltage】input: ac 100~240v, 50/60hz, output voltage can be adjusted from 3v to 24v dc (such as 3v 4v 4.5v 5v 5.5v 6v 9v 12v 14v 15v 19v 20v 24v). wattage max 3a, 72w; it can supply with amps less than 3a, such as 300ma, 500ma,1a, 1.5a, 2a, 2.5a, 3a.
- 【multiple dc tips】equipped with 14 frequently used plugs: micro-usb, type-c, dc terminal connector, 6.5x4.4mm+pin, 5.5x2.1mm, 5.5x3.0mm+pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm. universal ac adapter equipped with a reverse polarity converter. our dc plug polarity: inner positive(+), outer negative(-). you can use this ...
- 【worry-free shopping】package includes 1 x 3~24v 72w universal ac/dc adapter, 14 x dc tips, 1 x reverse polarity converter. built-in multiple safety protection systems and safe to use. all products tested and shipped. if you have any questions about the product, please feel free to contact us before returning. we support 30 days money back guarantee, 24 months free excha...
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Product Highlights
- Can use a mini screwdriver to adjust its consistantly adjustable output voltage by adjusting the potentiometer
- Wide voltage input of 4.5-40v and output of 1.25-37v but has low power-consumption of only about 3a
- Non-isolated lm2596 buck converter, dial down volt 36v 30v 24v to 12v 5v 3.7v 3.5v 3.3v 2v
- With over-temperature and short-circuit protection, hence it is safe to use
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Product Highlights
- Reverse connection protection-with protection against reverse connection of input terminal, stable performance and long service life
- Long service life-the converter adopts high quality plastic material, durable and long service life
- Multi specification lcd screen display-the lcd screen can display input and output voltage, output current, output power, output capacity and output time
- Anti‑backflow function-the output terminal of this buck boost converter has anti‑backflow function, no need to add anti‑backflow diode when charging the battery
- Profession and stable performance-this buck boost converter has a simple structure and professional design, the operation panel is easy to use with stable performance
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- Ac input: 100v 120v-240v 50/60hz, output: multi voltage dc 3v 4.5v 5v 6v 7.5v 9v 12v 1000ma max(compatible with less than 1 a, like 100ma 200ma 500ma 800ma amps
- Important note: the adapter dc plug polarity is center positive "+". please ensure it is same with your devices before buying. if your device is with centre negative polarity "-", please use it with belker polarity reversed cable together. search "b07pm24tkv" to find the cable on amazon.
- This adapter is with 8 different size adapter plugs which fit for your electronics well and solve your various problems.
- This ac/dc adapter can apply to most appliances which the input voltage is between 3v and 12v and the rating power is equal to or less than 12 watt.
- Package included: 1 x power adapter, 1 x dc plugs kit, 1 x switch key, 1 x manual, 1 x 12-month global warranty.
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Product Highlights
- It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+pin, 5.5x2.1mm, 5.5x3.0mm+pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, micro-usb, type-c and dc terminal connector. you can screw wires onto it easily, perfect for diy projects. please carefully check the tips dimension and confirm whether i...
- Built-in multiple safety protection systems. automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. we focus on producing premium quality and safety power adapters. no noise, no spontaneous combustion, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use.
- Input: ac 100~240v, 50/60hz ; output: dc 3~24v adjustable, max 3a 72w ; it can supply with any voltage between 3~24v,such as 3v 4v 4.5v 5v 5.5v 6v 9v 12v 14v 15v 19v 20v 24v, etc and any amp less than 3a, such as 300ma, 500ma,1a, 1.5a, 2a, 2.5a, 3a. lcd display will show the output voltage, in case that wrong voltage regulation damage your device.
- The 72w all-in-one multipurpose ac/dc adapter fit for many 3~24v small household electronics such as led strips, under-cabinet light, tv box, smart speaks, wireless routers, essential oil diffuser humidifier, usb fan, wifi camera, usb hub, hard disk box, dc motor, dc pump, digital photo frame, dvr nvr surveillance system etc.
- Please choose correct voltage before plug it to your device. wrong voltage may damage your device. we recommend to use less than 80% of the full load. we always stand behind our products. if there is any issue, please contact us anytime. we have 12 hour response，30 days money back guarantee, 12 months exchange.
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Product Highlights
- Automatic shutdown: converter has a variety of software protection mechanisms, and the protection threshold is adjustable. when the working parameters of the module exceed the protection threshold, the output is automatically shut down
- Technical parameters: buck boost converter has a small output ripple and can be equipped with a π filter. thick heat sink, integrated buck and boost
- Multiple applications: the voltage converter board can be used as a regular buck or boost module with overcurrent protection; used as a high power led constant current driver module; diy a solar controller, battery charging
- Safety protection: the input end of the power module has prevent reverse connection protection, which will not burn out during reverse connection. the output end is protected against counter current. no need to add counter current diodes when charging
- Display content: lcd voltage regulator can display input or output voltage, output current, output power, output capacity, output time
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Product Highlights
- 【input voltage】dc 3.2v to 35v (input voltage must be 1.5v higher than the output voltage, no boost).
- 【mini size】45 * 23 * 14 mm (with potentiometer). 6pcs included.
- 【high precision】the buck converter consists of 36u thickened circuit boards, high-q inductance with output led indicator, and superior solid-state capacitors that can effectively filter out high frequency noise. suitable for various electronic projects.
- 【output voltage】dc 1.25v to 30v voltage is continuously adjustable, maximum output current is 3a.
- 【easy to diy】connect to power source, using a mini screwdriver to increase or decrease output voltage by adjusting the screw on the blue potentiometer and monitor voltage with multimeter to get the needed voltage, clockwise to step up voltage and counterclockwise to step down voltage. (factory default stays a high voltage, you need to contrarotate about 7-15 circles bef...
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Product Highlights
- Voltage test range: dc 6.5~100v; current test range: 0~100a; power test range: 0~10kw; energy test range: 0~9999kwh.
- With external shunt, very accurate to measure electrical parameters, please note when connecting load, the dc power - should go through the shunt to connect the meter -.
- The portable multi-meter has a large-screen lcd, can display voltage, current, power, energy at the same time, bright and easy to read.
- Multifunctional: the accumulated energy can be reset by button; store data when power off; voltage alarm function (over voltage alarm threshold, backlight and voltage will flash to alarm).
- The blue backlight can be turned on/off by the front accessible recessed switch located on the right side bezel.
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