The PowerExtra Charger with Two Replacement Batteries, replacement for the Fuji NP-45*, is currently on sale for $14 by PowerExtra with the orders fulfilled by Amazon, so free 2-day shipping for Prime members.
The PowerExtra Charger and Two Batteries (replacing Olympus LI-90B, LI-92B) is on sale for $13 by PowerExtra with the order fulfilled by Amazon. They average 4.7 out of 5 based on 21 customer reviews. This is not a lightning deal.
The PowerExtra Charger and Two Batteries that are replacing the Panasonic DMW-BLF19* is on sale for $19 by PowerExtra with the order fulfilled by Amazon, averaging 4.2 out of 5 based on eight customer reviews. This is not a lightning deal.
Powerextra has some of their own replacement batteries on sale. Their bundle include one charger and two batteries of their own. They are as follows:
These are sold by PowerExtra with the orders fulfilled by Amazon, so Prime members get them in around days for free. Non-Prime members have the usual $35+ to get free shipping.
As usual, be sure to check reviews, and questions and forums and such if you are not familiar with them and the potential restrictions and limitations the OEM manufacturer places on 3rd-party batteries.
If you are comfortable with 3rd-party battery chargers, the PowerExtra Charger with Two Batteries (replacements for Canon LP-E17) is on sale for $18, sold by Powerextra’s Amazon store with the order fufilled by Amazon, so Prime members get 2-day free shipping on this. A car charger and a cleaning cloth are also included. It averages 3.9 out of 5 based on 9 customer reviews. The one unhappy 1-star review said the batteries did not work with the M3. Per the product description there (definitely read it before buying), these are not fully decoded, and you have to confirm in the camera’s menu that they are not genuine Canon before you can use them.