Looking for an inexpensive or lightweight booster seat, or a narrow option for a tight space? The Evenflo Big Kid Amp may be for you! These boosters are sold as high back or backless boosters. There are a few flavors of trim and features for this seat, we’ll look at the Amp in this review.
We’ve got an updated review of the Big Kid Sport in addition to this older review.
CSFTL Quick Stats
- High back booster weight range: 30-100 pounds (Canadian versions of this seat have a 40-100 pounds weight limit)
- High back booster height range: 38-57″
- Backless booster weight range: 40-110 pounds
- Backless booster height range: 40-57″
- Highest booster guide position: 19″
- Expiration: 6 years
- IIHS Best Bet in backless mode
- Vehicle headrest required for backless mode only
All models adjust easily by squeezing the handle on the back of the top of the headrest. The tallest of the six headrest positions is approximately 18.5″. You can use the back until the child’s shoulders go over the belt guide in the highest adjusted position. The seat converts to backless mode and is sold separately as a backless booster.
The Big Kid/Amp only require a vehicle headrest behind them when used in backless mode. The seat can be used backless until the upper weight limit, 57″, or the tops of the child’s ears are over the seat back or headrest. The seat does come with a seatbelt adjuster as well to help obtain proper fit when used in backless mode.
Fit to Child
High Back Mode
Five Years Old
This model is 5 years old. She’s barely at the minimum age and maturity level to ride in a booster. The Amp fits her well — the shoulder belt lies across the middle of her shoulder and the lap belt fits across the tops of her thighs. She was able to buckle herself in without too much trouble.
Nine Years Old
This model is 9 years old. She’s at the top of the height limit in backless mode but still has a bit of room in the seat.
Fit to Child
6 Years Old
This 6 year old Huggable Images doll is 48 inches and 46 pounds. The Evenflo Amp fits her well. The Amp does come with a seat belt adjuster guide, but even without using it, seat belt offers a proper fit.
Body slump while sleeping was the biggest downfall of this seat for our 6 year old car sleeper. This is clearly unsafe and improper use. She was able to sit and sleep properly when a forward facing car seat was next to her, but when it was replaced with a rear facing car seat, this started to happen. She had to use a different booster seat with more support for her head and torso to keep her upright when she fell asleep.
Three Car Seats Across
The Evenflo Big Kid/Amp worked great in three car seats across situations with quite a few different seats in our Town and Country minivan. The Amp didn’t have the no vehicle seat belt retraction issues that seem to plague the Town and Country’s third row. The belt retracted smoothly and maintained its position flat against the child’s chest.
Important Information: Where to Find
Expiration The Evenflo Big Kid/Amp has a 6 year expiration. If you turn the booster over, you will see the sticker containing the date of manufacture, model name, and expiration date, as well as the manual storage area.
Manual Storage The manual is stored on the bottom of the seat as shown in the picture to the left. This is helpful as you will always have the manual available when needed.
FAA Approval This seat is not FAA approved, but because of it’s more compact size, it would work well as a carry on for the child to use at their final destination.
- Does not require vehicle head support
- Converts to backless
- Not much head/torso support
- No lower anchors
The most important part of using a booster seat is that the child is mature enough to sit properly for the entire ride, and that the belt fits properly. A good booster fit positions the shoulder belt even across the torso – not sliding off the shoulder or cutting into the face; the lap belt should be low on the hips, touching the tops of the thighs.
The Evenflo AMP High Back Booster and Evenflo Amp No Back Booster versions are available on Amazon.com. It features built-in elastic cup holders and non-movable arms. The Big Kid Sport is similar to the Amp and is available at Wal-Mart.
The Evenflo Big Kid LX is only available in high back, but does convert to a backless booster. It features pull out cup holders on each side and flip-up arms. My kids found no difference in the ability to buckle themselves in with either type of armrest.
The Evenflo RightFit Booster is a slight variation of the Amp. It has the same bottom footprint, but much more sizable headrest and torso padding.
Neither Evenflo nor Amazon sponsored this review; as always, the opinions expressed are all mine!