Quick Answer

Choose a battery grip that matches your Canon DSLR model and shooting style. For full-frame cameras like the EOS 6D Mark II, the Canon BG-E21 offers dust- and water-resistant construction and holds two LP-E6 batteries. For Rebel series cameras, the Vivitar BG-E8 is a budget-friendly option that doubles shooting capacity with LP-E8 batteries and adds a vertical shutter release.

Why Add a Battery Grip?

A battery grip attaches to the bottom of your DSLR and holds additional batteries, effectively doubling your shooting capacity without swapping cells. It also provides a vertical shutter button and controls, making portrait-oriented shooting more comfortable and stable. These grips are especially useful for long events, studio sessions, or outdoor shoots where changing batteries is inconvenient.

Compatibility First: Check Your Camera Model

Battery grips are designed for specific camera bodies. The Canon BG-E21 fits only the EOS 6D Mark II, while the Vivitar BG-E8 is compatible with Canon EOS Rebel T2i, T3i, T4i, and T5i. Always verify your camera model before purchasing. Using an incompatible grip can damage the camera or fail to connect properly.

Battery Type and Capacity

Grips often use the same battery type as your camera. The BG-E21 holds two LP-E6/LP-E6N batteries, while the BG-E8 uses two LP-E8 batteries. Some grips also accept AA batteries via an optional tray, which can be a lifesaver when you run out of rechargeables. Check if the grip supports AA batteries if you prioritize flexibility.

Build Quality and Weather Sealing

Canon’s official BG-E21 features dust- and water-resistant construction, matching the EOS 6D Mark II’s sealing. Third-party grips like the Vivitar BG-E8 typically lack weather sealing, so they are less suitable for harsh conditions. If you shoot in rain or dusty environments, an OEM grip is worth the extra cost.

Decision Rules

  • Match the grip to your camera model: Check your Canon DSLR model number and compare it with the grip’s compatibility list. The BG-E21 works only with the EOS 6D Mark II; the BG-E8 works with Rebel T2i, T3i, T4i, and T5i. Write down your camera model before shopping.
  • Decide between OEM and third-party: OEM grips like the Canon BG-E21 offer weather sealing and perfect fit but cost more. Third-party grips like the Vivitar BG-E8 are cheaper and work well for indoor or fair-weather use. If you shoot outdoors in bad weather, invest in an OEM grip.
  • Consider battery flexibility: Some grips accept AA batteries in addition to the standard rechargeable pack. This can be useful for travel or emergencies. Check if the grip includes an AA battery tray or if it’s sold separately. If you travel to remote areas, a grip with AA support adds peace of mind.
  • Check for additional controls: A vertical grip should include a shutter release button, scroll wheel, and control buttons for easy operation in portrait mode. The Vivitar BG-E8 includes a shutter release and scroll wheel; the BG-E21 includes full vertical controls. Test the grip’s button layout if possible to ensure it feels natural.

Product Facts

  • Vivitar BG-E8 Multi-Power Battery Grip for Canon DSLR Camera EOS Rebel T2i, T3i, T4i, T5i: The Vivitar BG-E8 Multi-Power Battery Grip allows the Canon EOS Rebel T2i, T3i, T4i & T5i to be powered by two LP-E8 batteries. This effectively doubles your shooting capacity for long days of shooting, and the vertical shutter release improves comfort when shooting portraits.

    Vivitar BG-E8 Multi-Power Battery Grip for Canon DSLR Camera EOS Rebel T2i, T3i, T4i, T5i

    Vivitar BG-E8 Multi-Power Battery Grip for Canon DSLR Camera EOS Rebel T2i, T3i, T4i, T5i

  • Canon BG-E21 Battery Grip for EOS 6D Mark II: The Canon BG-E21 Battery Grip for EOS 6D Mark II holds up to two LP-E6/LP-E6N batteries and has dust- and water-resistant construction. It extends shooting time and provides reliable performance in challenging weather, making it ideal for outdoor and event photographers.

    Canon BG-E21 Battery Grip for EOS 6D Mark II

    Canon BG-E21 Battery Grip for EOS 6D Mark II

Who Should Buy Which Grip?

Best For

  • Canon EOS 6D Mark II owners who shoot in dusty or rainy conditions and want a seamless fit with weather sealing.
  • Canon Rebel series users (T2i–T5i) who want an affordable way to double battery life and improve portrait handling.

Not For

  • Photographers using a camera not listed in the grip’s compatibility chart.
  • Those on a tight budget who only shoot indoors and rarely need extra battery capacity.