The TrustFire, known as a cheaper option of charger, but still known to get the job done!
This charger is capable of 500mA when charging a single battery, or 250mA while both charging slots are being utilized.
This slower charging helps extend the life of your batteries by trickle charging them instead of rapid charging, yet it has a slow charge rate. If you can look past this, then this is a great option that won't hurt your wallet!
Trust Fire TR-001