Poor circuit design produces high-pitched hum on insertion (coil whine). The noise was measured at the location of the device at 47 dB. I have ordered a dual pack Blackout Buddy Charge (marked RCBB300W-DBL on this product page) and both have this issue. I ordered from the seller Eaton (manufacturer). Eton supplied me with two devices marked DOM-DF:1929. These devices may be older as they do not appear to be identical to what is currently shown on Revain (e.g. the connector is different, it has a rotating connector but no foldable connector; exit markings on USB ports are not displayed). Packaging is copyright 2016. I've been using the original Blackout Buddy in the smaller size for a while and it's a great product. I don't disapprove of Eton products but this high hum product is a huge disappointment and based on the reviews this is a common and longstanding issue that Eton is reluctant to address. Upgraded from 1 to 3 stars: I returned the Blackout Buddy Charge Dual Pack and replaced it with two Blackout Buddy Connect Charge (RCCONNECTCHG-AAG) chargers. This option cost me $10 more, which is a shame, but this other model doesn't suffer from the noise problem. I don't plan to use the internet connection feature, but the Connect model can work like Blackout Buddy Charge and is silent! The only disappointment is that my chargers arrived with completely dead batteries. These units have a manufacturing date older than two years. So if left for long periods of time without charging, the battery chemistry can be compromised, reducing the lifespan of the product. So the original Blackout Buddy and Blackout Buddy Connect Charge devices are fine, but avoid Blackout Buddy Charge.
Fast charger COMMO 65W Multi Charger Dual USB-C + USB-A, GaN, 65 W, COMMO Gray
39 Review
Wi-Fi router ASUS RT-AC66U, black
107 Review
Wi-Fi router ASUS RT-AC88U, black/red
41 Review
Dell XPS 15 & Precision M3800 Genuine 130W Slim Power AC Adapter - High-Quality Charger for 9530, 9550, 9560, 9570, 5510, 5520, 5530 Laptops (HA130PM130/DA130PM130)
13 Review
Western Digital WD Green SATA 240 GB SATA WDS240G2G0A Solid State Drive
51 Review
10.3" Lenovo Tab M10 FHD Plus 2nd Gen TB-X606F (2020), RU, 2/32 GB, Wi-Fi, Silver
47 Review
16" Apple MacBook Pro 16 Late 2019 3072x1920, Intel Core i7 2.6 GHz, RAM 16 GB, DDR4, SSD 512 GB, AMD Radeon Pro 5300M, macOS, RU, MVVJ2RU/A, space gray
58 Review
Backpack XD DESIGN P705.571 black
32 Review