Power your camera continually, and without interruption, with the ONsite Relay Camera Power System from Tether Tools. Equipped with a built-in 7.4V, 1,200mAh lithium battery and a 5 VDC input via USB, this system will provide power, while being connected to an external power source for a nearly constant source. When connected to a 2A USB battery pack or an AC adapter, the ONsite Relay can still be able to provide a constant supply of power to your camera, and thanks to the internal battery the system will support hot swapping of external power sources. An LED indicator light will shift from green to yellow to red to show battery percentage so that you will not accidentally lose power during a long time lapse or video production. This system is compatible with numerous camera systems through the use of a separately available coupler. This coupler fits into the battery compartment of your camera and acts as a dummy battery to supply power.
Tether Tools ONsite Relay Camera Power System
- Uninterruptible Power for a Camera
- 7.4V, 1,200mAh Lithium UPS Battery
- Powered by 5 VDC Power Source
- Internal Battery Allows Hot Swapping
Tether Tools Case Relay Overview
Tether Tools Case Relay Specs
| Chemistry | Lithium |
| Capacity | 1,200 mAh, 7.4 V |
| Input | 5 VDC, 2 A (Type A USB) |
| Output Voltage | 8 VDC, 2 A |
| Package Weight | 0.54 lb |
| Box Dimensions (LxWxH) | 7.6 x 7 x 1.45" |
Tether Tools Case Relay Reviews
Battery Failing After 3 Months
After 3 months of use, the battery is beginning to fail. I have not let it drain and keep it charged weekly. Now, while the device is plugged into my camera and I also have it connected to a power source the battery will drain and my camera turns off. The battery takes a long time to charge. So, it doesn't even work as just a straight power source cable.
Was great while it worked
Similar to other reviews posted, the battery in my unit failed to charge when I last went to use it rendering it unusable. My unit is out of warranty and no replacement was offered when I contacted the manufacturer, so it will now make it's way to the electronics recycling depot ...... Would not recommend purchasing this unit unless either the quality of the unit is improved, or the manufacturer offers 3+ years warranty to better share the risk with the purchaser.
Unreliable and short lasting
Pathetic product quality. I don't recommend buying this at all. Buggy cell. They should make it a replaceable cell. My camera was running longer on the actual battery that with this product. Again, I always keep the battery powered on (learned from the other reviews not to keep it powered down).
Works Great
Coupled with the camera appropriate cable, this system works great. If you do long time-lapses it is a must have. If your external power-pack is running low simply switch it to a new one without the camera losing power. I'm probably going to pick up another system for my wife's camera.
Ugh! I too should have learned my lesson the first time.
I bought a second one after the first died and thought I was plugging it in often enough.. but sure enough the second one died too within a year of purchase. Don't waste your $100 unless you really need it for one profitable job and don't expect to use it at a later date.
DO NOT BUY THIS PRODUCT
I cannot adequately express my frustration at the unreliability of this product. I have (stupidly) owned two ( I didn't learn my lesson from the first one ) and BOTH of them crapped out. I was told by Tether Tools that if you don't REGULARLY plug this in to keep the battery topped off it will die. I guess it's like babysitting a sourdough starter, you have to nurse it every day. Well, I'm NOT a professional photographer and want to use things like this system maybe 3-4 times a year. But I also have numerous other photo devices (intervalometers, trackers, etc. etc.) with batteries that DONT have to be nursed every day. Bottom line, I suppose if you use this thing every day and keep it topped off, it might work fine for you. Otherwise, If you go a month without using it, I WILL NOT CHARGE and is totally useless. Save your money.
Great while it worked
Once the internal battery dies, you're out of luck. Yellow light now showing on my 2 yr old unit which indicates the battery is not able to fully charge and this results in erratic performance with D850 in live mode. Recognizing the typical lifespan of batteries, you will probably be replacing the $99 unit every couple of years. Appalling that there is no means to simply replace the internal battery .
Works well!
Bought it and tested it over a week, works well. Overall good purchase.
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