best battery backup

Rating details & item highlights

• Weight: .23 Pounds
• Volts: 1.5 Volts
• Package Quantity: 4
• Rechargeable: Single-Use
• Battery: 4 AA Alkaline, Required, Included

Rating details & item highlights

• Weight: 3 Grams
• Volts: 3 Volts
• Package Quantity: 2
• Rechargeable: Single-Use
• Maximum Battery Charge Life: 10 Years
• Battery: 2 CR2032 Lithium

Rating details & item highlights

• Portable Power: One of the lightest 10,000mAh PD portable chargers in the market. Slimline design fits neatly next to smartphones, in palm or pocket.
• Wide Compatibility: Support PD QC SCP charging technology with max charging power up to 22.5W.
• Triple Charging Modes: 20W Power-Delivery USB-C port, SCP-enabled USB-A & USB-C port and trickle-charging mode for low-power devices. Use the two-way USB ports to charge three devices simultaneously.
• Slim Size, Big Power: The compact 10,000mAh power bank provides enough power for travel and daily use.
• Dimensions (Overall): 2.81 Inches (H) x .63 Inches (W) x 5.94 Inches (D)
• Weight: .49 Pounds
• Batteries Charged Simultaneously: 2 (max)
• Battery Capacity: 10000 (mAh)
• Volts: 10 Volts
• Electronics Features: Built-In Cable, Charge Indicator Light, Smart Charging

Rating details & item highlights

• Convenient multihub base with 4 power banks
• Compatible with most USB-C connections for easy use
• Multi-colored design with charge light for clear indication
• Charges up to 4 devices simultaneously with a 12-watt output
• Comes with a 1-year limited warranty
• Dimensions (Overall): 3.07 Inches (H) x 6.49 Inches (W) x 2.29 Inches (D)
• Weight: 1 Pounds
• Batteries Charged Simultaneously: 4 (max)
• Volts: 5 Volts
• Battery Capacity: 4200 (mAh)
• Electronics Features: Charge Indicator Light

Rating details & item highlights

• quality
  4.2 out of 5
• value
  4.2 out of 5

• Keep your family safe with this easy-to-use plug-in carbon monoxide alarm; it works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide levels, even if there's a power failure
• Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
• Simple to use, with a single test/silence button; a loud 85-decibel alarm sounds when Carbon Monoxide levels reach dangerous levels
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• 7-year limited warranty; equipped with end-of-life signal chirp, so you know when it's time to replace the unit for safety
• All First Alert CO alarms are rigorously tested to meet UL standards
• Dimensions (Overall): 3.38 Inches (H) x 4.87 Inches (W) x 2.23 Inches (D)
• Weight: .51 Pounds
• Package Quantity: 1
• Requires Hardwired Installation: No
• Battery: 1 9-Volt Alkaline
• Warranty: 7 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869