If you use the charging contacts from your phone, it should work but be careful of how you connect them to the contacts on the battery as I would certainly recommend not to do any soldering to a Li-ion battery.
Li-ion batteries are very safe if used properly but please believe me that they are very dangerous if they do explode. The battery in the video that I posted was intentionally abused just to show what it looks like if they do explode and if they do. Please reconsider if it is worth the risk, potential health issues would be:
Eye Issues
The effects of an exploding battery can be quite damaging to eye tissues. Fire can aggravate a battery to explode, and the corrosive material inside the battery cells can get sprayed right into the eyes, causing severe pain. The eyes need to be washed for a good 15 minutes straight, and medical attention should be sought immediately thereafter. Blindness is most definitely a potential threat from this kind of lithium ion battery explosion.
Skin Issues
Skin issues can also be a result of exploding lithium ion batteries. Additionally, handling of batteries that are leaking the material from the cells can cause both allergic reactions and severe burns to the skin. When this occurs, you need to remove any clothing that has become contaminated, flush the affected areas with cool water for 15 minutes, then wash with soap and water. Topical burn creams can be used afterward. Seeking medical help may be necessary.
Throat and Gastrointestinal Issues
With regard to throat and stomach issues, ingestion of the solution in the battery's cells along with ingesting cobalt itself, which is a known carcinogen, can be harmful to the delicate tissues of the throat and stomach as well as become a cause for cancer in the affected areas. If this occurs, giving water to help dilute what has been ingested, while getting immediate medical attention, is mandatory. If the person who has ingested it loses consciousness, do not give anything by mouth.
Lungs and Breathing Issues
Although inhalation does not normally occur, unless there is a fire, vapors and fumes can irritate the tissues of the nose, throat and lungs. If this occurs, the person who has inhaled the vapors or fumes from an exploded battery must be brought to fresh air, immediately seeking medical attention thereafter. The victim might require oxygen. Normally, medical teams will assess the need for this once having arrived on the scene.