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Thank you for purchasing the Celestron ThermoTank 3! The 
ThermoTank 3 is an essential multi-use tool designed to be used 
in the elements. Its portable, high-capacity power pack can 
supply power to your cell phone, MP3 player, and many other 
USB-powered devices.  

WARNING:

  Read all instructions and warnings thoroughly  

before using ThermoTank 3. Improper use of 
this product may result in product damage, excess 
heat, toxic fumes, fire or explosion. Do not allow 
children to use this product without proper 
adult supervision.

WHAT’S IN THE BOX:

1  - 

ThermoTank 3

1  - 

USB cable with Mini USB connection

1  - 

Soft carrying bag

THERMOTANK 

3

1. 

Mini USB port

2. 

On/off button

3.

 Red LED- Charging indicator

4.

 Green LED- Heat indicator 

  

1.  CHARGING THE INTERNAL LITHIUM  

ION BATTERY 

Your ThermoTank 3 hand warmer has an internal, 3000 mAh 
rechargeable lithium ion battery, which allows for up to 4 hours 
of continuous use at a constant temperature of 104° to 113° 
Fahrenheit (40° to 45° Celsius). Your ThermoTank 3 ships 
with a partial charge, but you should charge it completely 
before using it for the first time.  
Follow these steps to charge the internal battery:   
1.   Attach the Mini USB connector end of the included USB cable 

to the Mini USB “in” port (1) on your ThermoTank 3.

2.   Plug the standard USB plug end of the cable into a USB port
    on a PC, laptop, car charger or USB 5V- 900mA adapter plug.
3.  Once plugged in, the red LED (3) will start to blink, 

indicating that charging is in progress.  

4.  Charging is complete when the red LED (3) stops blinking.

NOTE:  

The ThermoTank 3 is designed with overcharge 
protection to prevent damage to the internal battery.

2. USING THE HAND WARMER

•  Press and release the on/off button once (2). The unit will 

begin to heat up. In minutes, it will reach its maximum 
temperature and you will feel the heat being conducted 
through the aluminum housing.  

•  Press the on/off button again to turn the ThermoTank 3 off.

3. SPECIFICATIONS

BATTERY: 

Rechargeable lithium polymer – 3000 mAh 

INPUT: 

Mini USB Connector / 5V- 900mA  

INTERNAL BATTERY CHARGE TIME: 

USB -  5 hours

MINIMUM NUMBER OF RECHARGES: 

>500 

LED STATUS INDICATORS:

(1)   Red LED - Charging indicator 
(1) Green LED- Heat indicator

HAND WARMER TEMPERATURE RANGE: 

104° TO 113° Fahrenheit (40° TO 45° Celsius)

HAND WARMER CONTINUOUS USE TIME:

 

Up to 4 hours continuous use (based on fully charged battery)

OPERATING TEMPERATURE RANGE: 

32° to 113° Fahrenheit (0° to 45° Celsius)

STORAGE TEMPERATURE RANGE:

68° to 77° Fahrenheit (optimal)

WEIGHT:

 5.22 oz. (148 grams)  

DIMENSIONS: 

1.76 in x  3.72 in x 0.9 in 

(44.9 mm x 94.6 mm x 22.9 mm)

NOTE:

  

Storage of more than 6 months without use may 
have detrimental effects on the condition of the 
lithium ion battery. It is recommended that you 
discharge and recharge fully every 3-4 months to 
maintain optimal battery life.

WARNINGS:

 

Read all instructions and warnings prior to using this product. 
Improper use of this product may result in product damage, 
excess heat, toxic fumes, fire or explosion, for which damages 
you (“Purchaser”), and not Smart Team or Celestron (collectively 
“Manufacturer”) are responsible.
•  Do not store battery in high temperature environment, including 

intense sunlight. 

•  Do not place battery in fire or other excessively hot environments. 

•  Be cautious of excessive drops, bumps, abrasions or other 

impacts to this battery. If there is any damage to the battery 
such as dents, punctures, tears, deformities or corrosion, due 
to any cause, discontinue use and contact manufacturer or 
dispose of it in an appropriate manner at your local battery 
recycling center. 

•  Do not disassemble this battery or attempt to repair or modify 

it in any manner.

•  Do not expose this battery to moisture or submerge it in liquid. 

Keep battery dry at all times.

•  Do not attempt to charge battery using any method, apparatus 

or connection other than the device’s USB connector. For 
questions or instructions for the various ways to charge the 
ThermoCharge 3, refer to this manual.

•  Do not attempt to replace any part of this battery.
•   This battery is intended for adult use only. If this battery is 

intended by Purchaser to be used by a minor, purchasing 
adult agrees to provide detailed instructions and warnings to 
any minor prior to use. Failure to do so is sole responsibility 
of Purchaser, who agrees to indemnify Manufacturer for any 
unintended use/misuse by a minor.

•    All batteries have gone through a thorough quality assurance 

inspection. If you find that your battery is excessively hot, is 
emitting odor, is deformed, abrased, cut or is experiencing or 
demonstrating an abnormal phenomenon, immediately stop all 
battery use and contact Manufacturer.

•  For extended storage, first charge your battery for at least 

one hour.

•  Never dispose of batteries in the garbage. Disposal of batteries 

in the garbage is unlawful, in the United States, under state and 
federal environmental laws and regulations. Always take used 
batteries to your local battery-recycling center.

DISCLAIMER: 

Manufacturer shall not in any way be liable to you or to any third 
party for any damages you or any third party may suffer as a 
result of use, intended or unintended, or misuse of this battery. 
Manufacturer will not be responsible for any damages you or 
any third party may suffer as a result of misuse of this battery 
as outlined above. If you are responsible for battery use with an 
unintended mobile device and damages result from such use, you 
agree to indemnify Manufacturer for any resulting injuries to any 
third party or parties. 
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.

Model # 48028

ENGLISH

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