I wanted at least one recharge for my iPhone if we had a power outage, so I picked up one of these solar batteries for myself and another for my brother.  The problem with the Opteka is if you need another recharge for your phone, you need to wait two to five days for the sun to recharge it.  To solve this problem, I picked up a 10 watt solar panel made by Instapark for $63&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Instapark-10-Watt-Solar-Panel-Portable-Solar-Charger-with-Dual-USB-Ports-for-iPhone-iPad-all-other-USB-Compatible-Devices/dp/B006ZRYU9O/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Instapark 10 Watt Solar Panel Portable Solar Charger with Dual USB Ports for iPhone, iPad & all other USB Compatible Devices</a>.  The additional solar panel charges the Opteka in a day.  On days when the sun isn't shinning, I have two 8400 mA batteries capable of another 6 charges.

If you don't want to spend a lot of money and need some type of emergency power backup for your phone, the Opteka might work for you.  The quality is acceptable and you have a backup for your phone.  If you want a quick way to solar charge your Opteka solar battery, spend another $63 and get the Instapark 10 Watt portable solar panel.  For less than $100, you have a solar battery that works very well.
I wanted at least one recharge for my iPhone if we had a power outage, so I picked up one of these solar batteries for myself and another for my brother. The problem with the Opteka is if you need another recharge for your phone, you need to wait two to five days for the sun to recharge it. To solve this problem, I picked up a 10 watt solar panel made by Instapark for $63&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Instapark-10-Watt-Solar-Panel-Portable-Solar-Charger-with-Dual-USB-Ports-for-iPhone-iPad-all-other-USB-Compatible-Devices/dp/B006ZRYU9O/ref=cm_cr_arp_d_rvw_txt? ie=UTF8">Instapark 10 Watt Solar Panel Portable Solar Charger with Dual USB Ports for iPhone, iPad & all other USB Compatible Devices</a>. The additional solar panel charges the Opteka in a day. On days when the sun isn't shinning, I have two 8400 mA batteries capable of another 6 charges. If you don't want to spend a lot of money and need some type of emergency power backup for your phone, the Opteka might work for you. The quality is acceptable and you have a backup for your phone. If you want a quick way to solar charge your Opteka solar battery, spend another $63 and get the Instapark 10 Watt portable solar panel. For less than $100, you have a solar battery that works very well.