Quick Start Guide
V1 ENGLISH 21-0152
Safety information
• Do not expose your portable battery to heat, re, or
water.
• Do not modify, disassemble, open, drop, crush,
puncture, or shred the internal battery.
• This is not a toy. Young children should be supervised
to make sure that they do not play with the portable
battery.
• Do not charge devices while the portable battery is
recharging.
• Recharge the portable battery if it has not been used
for more than 90 days.
• Risk of res and burns. Do not open, crush, heat above
140° F (60° C), or incinerate. Follow the
manufacturer’s instructions.
• Operating environment temperatures:
32 ~ 104° F (0 ~ 40° C)
This product is safe for regular use under normal
conditions. As with any device using electrical power,
some situations may be unsafe and injuries or damages
could result. To minimize or avoid unsafe conditions,
read and follow the instructions before using.
Warning
When using this product, basic precautions should always
be followed, including the following:
1 Read all the instructions before using the product.
2 To reduce the risk of injury, close supervision is
necessary when the product is used near children.
3 Do not put ngers or hands into the product.
4 Do not expose the battery to liquids.
6 Do not use the battery in excess of its output rating.
Overloaded outputs above that rating may result in a
risk of re or injury to persons.
7 Do not use a battery that is damaged or modied.
Damaged or modied batteries may exhibit
unpredictable behavior, resulting in re, explosion, or
risk of injury.
8 Do not disassemble the battery. Take it to a qualied
service person when service or repair is required.
Incorrect reassembly may result in a risk of injury to
persons.
9 Do not expose a battery to re or excessive
temperature. Exposure to re or temperature above
212° F (100° C) may cause an explosion.
10 Have servicing performed by a qualied repair person
using only identical replacement parts. This will
ensure that the safety of the product is maintained.
Legal notices
Declaration of Conformity:
Brand name/model number:
Best Buy essentials BE-MMB10K22K
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired operation.
Suppliers Name: Best Buy Purchasing, LLC. Suppliers
Address (USA): 7601 Penn Ave South, Richeld, MN 55423
U.S.A. Suppliers phone number: 1-877-467-4289.
FCC Caution:
Changes or modications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.
FCC Statement:
Note: This equipment has been tested and found to
comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment o and on, the user is encouraged to try and
correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
dierent from that to which the receiver is connected.
• Consult the dealer or an experienced technician for
help.
ICES Statement
CAN ICES-3(B)/NMB-3(B)
One-year limited warranty
Visit
www.bestbuy.com/bestbuyessentials
for details.
Contact Best Buy essentials
For customer service, call
866-597-8427 (U.S. and Canada)
www.bestbuy.com/bestbuyessentials
Best Buy essentials is a trademark of Best Buy and its aliated
companies.
Distributed by Best Buy Purchasing, LLC
7601 Penn Ave South, Richeld, MN 55423 U.S.A.
©2021 Best Buy. All rights reserved.


