Mobile phones can be very useful for communications on trips and on searches.  However, many phone batteries will go flat after a day or two of use.   Small battery packs are available that can be used to recharge a mobile phone using either AA or AAA batteries.  They can also double up as a charging device when connected via USB lead to a computer or USB wall charger.

Inca battery pack

• LED torch included
• Charge batteries via USB lead from computer or wall charger
• Charge phone via USB lead supplied with phone
• 4 X AAA batteries 

Varta battery pack

• Charge batteries via USB lead from computer or wall charger
• Charge phone via USB lead supplied with phone
• 2 X AA or 2 X AAA batteries
• Includes a variety of adapter plugs for different mobile phone connections